IA Scholar Query: A few more r-orthogonal latin squares.
https://scholar.archive.org/
Internet Archive Scholar query results feedeninfo@archive.orgWed, 03 Aug 2022 00:00:00 GMTfatcat-scholarhttps://scholar.archive.org/help1440Higher Berry Phase of Fermions and Index Theorem
https://scholar.archive.org/work/lkhzodqwefd65k3fqrlvanaicm
When a quantum field theory is trivially gapped, its infrared fixed point is an invertible field theory. The partition function of the invertible field theory records the response to various background fields in the long-distance limit. The set of background fields can include spacetime-dependent coupling constants, in which case we call the corresponding invertible theory a parameterized invertible field theory. We study such parameterized invertible field theories arising from free Dirac fermions with spacetime-dependent mass parameters using the Atiyah-Patodi-Singer index theorem for superconnections. In particular, the response to an infinitesimal modulation of the mass is encoded into a higher analog of the Berry curvature, for which we provide a general formula. When the Berry curvature vanishes, the invertible theory can still be nontrivial if there is a remaining torsional Berry phase, for which we list some computable examples.Yichul Choi, Kantaro Ohmoriwork_lkhzodqwefd65k3fqrlvanaicmWed, 03 Aug 2022 00:00:00 GMTQuantum Field Theory Anomalies in Condensed Matter Physics
https://scholar.archive.org/work/bq26t7hnvrgd3e6k5hsryst4b4
We give a pedagogical introduction to quantum anomalies, how they are calculated using various methods, and why they are important in condensed matter theory. We discuss axial, chiral, and gravitational anomalies as well as global anomalies. We illustrate the theory with examples such as quantum Hall liquids, Fermi liquids, Weyl semi-metals, topological insulators and topological superconductors. The required background is basic knowledge of quantum field theory, including fermions and gauge fields, and some familiarity with path integral and functional methods. Some knowledge of topological phases of matter is helpful, but not necessary.R. Arouca, Andrea Cappelli, T. H. Hanssonwork_bq26t7hnvrgd3e6k5hsryst4b4Tue, 02 Aug 2022 00:00:00 GMTData Fusion: Theory, Methods, and Applications
https://scholar.archive.org/work/ntcpnuxe4zd3do75kjdnhn6j6a
A proper fusion of complex data is of interest to many researchers in diverse fields, including computational statistics, computational geometry, bioinformatics, machine learning, pattern recognition, quality management, engineering, statistics, finance, economics, etc. It plays a crucial role in: synthetic description of data processes or whole domains, creation of rule bases for approximate reasoning tasks, reaching consensus and selection of the optimal strategy in decision support systems, imputation of missing values, data deduplication and consolidation, record linkage across heterogeneous databases, and clustering. This open-access research monograph integrates the spread-out results from different domains using the methodology of the well-established classical aggregation framework, introduces researchers and practitioners to Aggregation 2.0, as well as points out the challenges and interesting directions for further research.Marek Gagolewskiwork_ntcpnuxe4zd3do75kjdnhn6j6aTue, 02 Aug 2022 00:00:00 GMTScattering Amplitude Techniques in Classical Gauge Theories and Gravity
https://scholar.archive.org/work/vq5dy5rfyjfnnndxwb4gxkumvu
In this thesis we present a study of the computation of classical observables in gauge theories and gravity directly from scattering amplitudes. In particular, we discuss the direct application of modern amplitude techniques in the one, and two-body problems for both, scattering and bounded scenarios, and in both, classical electrodynamics and gravity, with particular emphasis on spin effects in general, and in four spacetime dimensions. Among these observables we have the conservative linear impulse and the radiated waveform in the two-body problem, and the differential cross section for the scattering of waves off classical spinning compact objects. Implications of classical soft theorems in the computation of classical radiation are also discussed. Furthermore, formal aspects of the double copy for massive spinning matter, and its application in a classical two-body context are considered. Finally, the relation between the minimal coupling gravitational Compton amplitude and the scattering of gravitational waves off the Kerr black hole is presented.Yilber Fabian Bautistawork_vq5dy5rfyjfnnndxwb4gxkumvuMon, 01 Aug 2022 00:00:00 GMTJohn Horton Conway (1937–2020)
https://scholar.archive.org/work/atrm67fze5fjbb7qhm75morete
Alex Ryba, R T Curtis, Richard Borcherds, Manjul Bhargava, Dierk Schleicher, Jane Gilman, Aaron Siegel, Louis H. Kauffmanwork_atrm67fze5fjbb7qhm75moreteMon, 01 Aug 2022 00:00:00 GMTGeneralized pentagonal geometries – II
https://scholar.archive.org/work/2dh3hrls6bavrgiasain2vfol4
A generalized pentagonal geometry PENT(k,r,w) is a partial linear space, where every line is incident with k points, every point is incident with r lines, and for each point, x, the set of points not collinear with x forms the point set of a Steiner system S(2,k,w) whose blocks are lines of the geometry. If w = k, the structure is called a pentagonal geometry and denoted by PENT(k,r). The deficiency graph of a PENT(k,r,w) has as its vertices the points of the geometry, and there is an edge between x and y precisely when x and y are not collinear. Our primary objective is to investigate the construction of geometries PENT(k,r,w) where the deficiency graph has girth 4. In addition, we present some new PENT(5,r) with connected deficiency graphs. Consequentially we prove that there exist pentagonal geometries PENT(5,r) with deficiency graphs of girth at least 5 for r ≥ 200000, r congruent to 0 or 1 modulo 5.Anthony D. Forbes, Carrie G. Rutherfordwork_2dh3hrls6bavrgiasain2vfol4Mon, 01 Aug 2022 00:00:00 GMTDark energy: EFTs and supergravity
https://scholar.archive.org/work/wdyew7mperdkrb2zc7csvuouqe
The subject of this thesis is cosmological implications of string compactifications understood in a broad sense. In the first half of the thesis, we will begin by reviewing the four-dimensional description of the tree-level perturbative type IIB action. We will then review a number of open questions in cosmology and their relevance with regards to the remainder of the thesis. We will first explore some of these cosmological questions from the perspective of effective field theories motivated by supergravity. From the naturalness of dark energy and how to obtain a naturally light dark energy field in terms of the clockwork mechanism and the Dvali-Kaloper-Sorbo four-form mixing. We also discuss the coincidence problem for dynamical models of dark energy consistent with a quintessence field slowly rolling down a potential slope, of the type one would expect from the asymptotics of moduli space. In the second half of the thesis, we introduce the effects of perturbative and non-perturbative corrections to the tree-level type IIB action. We then focus on obtaining a viable model of quintessence from the type IIB effective field theory. However, we are able to show that such a model must have a non-supersymmetric Minkowski vacuum at leading order. When we consider the effects of quantum fluctuations during the early Universe, we see that such models must have extremely fine-tuned initial conditions to describe a slow-rolling scalar field at present times. We conclude that quintessence faces more challenges than a true cosmological constant, to the point that quintessence is very unattractive for model building modulo a ruling out of the cosmological constant by observations. Following this line of reasoning, we consider whether other perturbative corrections can generate de Sitter solutions in an appropriate setting.Francesc Cunillerawork_wdyew7mperdkrb2zc7csvuouqeSat, 30 Jul 2022 00:00:00 GMTPerceptual warping exposes categorical representations for speech in human brainstem responses
https://scholar.archive.org/work/y6hlqbnx3vfepkimg5du6sitb4
ABSTRACTThe brain transforms continuous acoustic events into discrete category representations to downsample the speech signal for our perceptual-cognitive systems. Such phonetic categories are highly malleable and heir percepts can change depending on surrounding stimulus context. Previous work suggests these acoustic-phonetic mapping and perceptual warping of speech emerge in the brain no earlier than auditory cortex. Here, we examined whether these auditory-category phenomena inherent to speech perception occur even earlier in the human brain, at the level of auditory brainstem. We recorded speech-evoked frequency following responses (FFRs) during a task designed to induce more/less warping of listeners' perceptual categories depending on stimulus presentation order of a speech continuum (random, forward, backward directions). We used a novel clustered stimulus paradigm to rapidly record the high trial counts needed for FFRs concurrent with active behavioral tasks. We found serial stimulus order caused perceptual shifts (hysteresis) near listeners' category boundary confirming identical speech tokens are perceived differentially depending on stimulus context. Critically, we further show neural FFRs during active (but not passive) listening are enhanced for prototypical vs. category-ambiguous tokens and are biased in the direction of listeners' phonetic label even for acoustically-identical speech stimuli. Our data expose FFRs carry category-level information and suggest top-down processing actively shapes the neural encoding and categorization of speech at subcortical levels. These findings suggest the acoustic-phonetic mapping and perceptual warping in speech perception occur surprisingly early along the auditory neuroaxis, which might aid understanding by reducing ambiguity inherent to the speech signal.Jared A. Carter, Gavin M. Bidelmanwork_y6hlqbnx3vfepkimg5du6sitb4Fri, 29 Jul 2022 00:00:00 GMTInvestigating High Performance Implementations of Sparse Code Multiple Access (SCMA) Codebook Design
https://scholar.archive.org/work/wce72zbccfa3xctdtdjv2ha52e
-The number of mobile devices, IoT devices, and their applications is increasing day by day in recent years and further going to increase in coming years. These applications and devices demand large connectivity, high throughput, and low latency which can be possible only in the B5G or 6G. The effective utilization of the spectrum is done by multiple access techniques which facilitate the spectrum to accommodate a large number of users. The 5G has different new technologies to support the massive user demand and high-speed data rate. The non-orthogonal multiple access scheme (NOMA) is considered for the B5G or 6G. The NOMA offers a massive number of user connectivity in contrast to the OMA which is an orthogonal multiple access scheme. The performance evaluation of the SCMA is investigated and recent advancement in the field of NOMA is discussed in this paper. The BER performance of Capacity-based codebook design and codebook design based on lattice constellation is evaluated on the two different channels i.e AWGN and Rayleigh fading channel. The behavior of capacity-based codebook design is better than lattice-based codebook design. The performance of both codebook designs surpasses AWGN in contrast to the Rayleigh fading channel by the multipath available in the Rayleigh Fading channel.Halar Mustafa, Department of Electrical Engineering, Hamdard University, Karachi, Pakistan, Muhammad Ahsan Shaikh, Muhammad Ahmed Sikander, Sadiq Ur Rehman, Mohammed Rafiq, Department of Electrical Engineering, Hamdard University, Karachi, Pakistan, Department of Electrical Engineering, Hamdard University, Karachi, Pakistan, Department of Electrical Engineering, Hamdard University, Karachi, Pakistan, Department of Public Health, Majmaah University, Al-Majmaah, Saudi Arabiawork_wce72zbccfa3xctdtdjv2ha52eFri, 29 Jul 2022 00:00:00 GMTNo-go Theorem for Scalar-Trispectrum-Induced Gravitational Waves
https://scholar.archive.org/work/g7lcvjbxfjb7pomyubqeri4ap4
We show that the contribution of the primordial trispectrum to the energy density of the scalar-induced stochastic gravitational wave background cannot exceed the one from the scalar power spectrum in conventional inflationary scenarios. Specifically, we prove in the context of scale-invariant theories that neither regular trispectrum shapes peaking in so-called equilateral configurations, nor local trispectrum shapes diverging in soft momentum limits, can contribute significantly. Indeed, those contributions are always bound to be smaller than an order-one (or smaller) number multiplying the relative one-loop correction to the scalar power spectrum, necessarily much smaller than unity in order for the theory to be under perturbative control. Since a no-go theorem is only worth its assumptions, we also briefly discuss a toy model for a scale-dependent scalar spectrum, which confirms the robustness of our no-go result.Sebastian Garcia-Saenz, Lucas Pinol, Sébastien Renaux-Petel, Denis Werthwork_g7lcvjbxfjb7pomyubqeri4ap4Thu, 28 Jul 2022 00:00:00 GMTA SAT Attack on Rota's Basis Conjecture
https://scholar.archive.org/work/s7kunpczlna3vatluxqlucu36e
The SAT modulo Symmetries (SMS) is a recently introduced framework for dynamic symmetry breaking in SAT instances. It combines a CDCL SAT solver with an external lexicographic minimality checking algorithm. We extend SMS from graphs to matroids and use it to progress on Rota's Basis Conjecture (1989), which states that one can always decompose a collection of r disjoint bases of a rank r matroid into r disjoint rainbow bases. Through SMS, we establish that the conjecture holds for all matroids of rank 4 and certain special cases of matroids of rank 5. Furthermore, we extend SMS with the facility to produce DRAT proofs. External tools can then be used to verify the validity of additional axioms produced by the lexicographic minimality check. As a byproduct, we have utilized our framework to enumerate matroids modulo isomorphism and to support the investigation of various other problems on matroids.Markus Kirchweger, Manfred Scheucher, Stefan Szeider, Kuldeep S. Meel, Ofer Strichmanwork_s7kunpczlna3vatluxqlucu36eThu, 28 Jul 2022 00:00:00 GMTThe Bacco Simulation Project: Bacco Hybrid Lagrangian Bias Expansion Model in Redshift Space
https://scholar.archive.org/work/rgfrouixxjbp5njbhfrde2pdjm
We present an emulator that accurately predicts the power spectrum of galaxies in redshift space as a function of cosmological parameters. Our emulator is based on a 2nd-order Lagrangian bias expansion that is displaced to Eulerian space using cosmological N-body simulations. Redshift space distortions are then imprinted using the non-linear velocity field of simulated particles and haloes. We build the emulator using a forward neural network trained with the simulations of the BACCO project, which covers an 8-dimensional parameter space including massive neutrinos and dynamical dark energy. We show that our emulator provides unbiased cosmological constraints from the monopole, quadrupole, and hexadecapole of a mock galaxy catalogue that mimics the BOSS-CMASS sample down to nonlinear scales (k∼0.6[h/Mpc]^3). This work opens up the possibility of robustly extracting cosmological information from small scales using observations of the large-scale structure of the Universe.Marcos Pellejero-Ibanez, Raul E. Angulo, Matteo Zennaro, Jens Stuecker, Sergio Contreras, Giovanni Arico, Francisco Maionwork_rgfrouixxjbp5njbhfrde2pdjmWed, 27 Jul 2022 00:00:00 GMTNumerical relativity for Horndeski gravity
https://scholar.archive.org/work/fw6twzs5nvav3ag6ncmomdgsbe
We present an overview of recent developments in the numerical solution of Horndeski gravity theories, which are the class of all scalar-tensor theories of gravity that have second order equations of motion. We review several methods that have been used to establish well-posed initial value problems for these theories, and discuss well-posed formulations of the constraint equations. We also discuss global aspects of exact, strongly coupled solutions to some of Horndeski gravity theories: the formation of shocks, the loss of hyperbolicity, and the formation of naked curvature singularities. Finally we discuss numerical solutions to binary black hole and neutron star systems for several Horndeski theories.Justin L. Ripleywork_fw6twzs5nvav3ag6ncmomdgsbeTue, 26 Jul 2022 00:00:00 GMTPhase Transition of Parabolic Ginzburg–Landau Equation with Potentials of High-Dimensional Wells
https://scholar.archive.org/work/hnd3hy7rtza6pds6irz5efolje
In this work, we study the co-dimensional one interface limit and geometric motions of parabolic Ginzburg--Landau systems with potentials of high-dimensional wells. The main result generalizes the one by Lin et al. (Comm. Pure Appl. Math., 65(6):833-888, 2012) to a dynamical case. In particular combining modulated energy methods and weak convergence methods, we derive the limiting harmonic heat flows in the inner and outer bulk regions segregated by the sharp interface, and a non-standard boundary condition for them. These results are valid provided that the initial datum of the system is well-prepared under natural energy assumptions.Yuning Liuwork_hnd3hy7rtza6pds6irz5efoljeTue, 26 Jul 2022 00:00:00 GMTProsperity or pollution? Mineral mining and regional growth in industrializing Japan
https://scholar.archive.org/work/wl4ct5d7zbb2zcoeosziqsuw44
This study investigates the impact of coal mining on the regional economy in industrializing Japan. By linking the location information of mines with registration- and census-based statistics, I found that mines increased the local population via internal migration. This led to a local, structural shift from the agricultural sector to the mining, manufacturing, and service sectors, depending on sex. I also found that these effects are heterogeneous with respect to the type of mines; coal mines are more likely to have stronger effects than heavy metal mines. While coal mines increase the risk of fetal and infant deaths, the metal mines improve the health status of infants.Kota Ogasawarawork_wl4ct5d7zbb2zcoeosziqsuw44Tue, 26 Jul 2022 00:00:00 GMTHandling Hard Affine SDP Shape Constraints in RKHSs
https://scholar.archive.org/work/bcuvu4iayzhjzpkfbfouvnthiq
Shape constraints, such as non-negativity, monotonicity, convexity or supermodularity, play a key role in various applications of machine learning and statistics. However, incorporating this side information into predictive models in a hard way (for example at all points of an interval) for rich function classes is a notoriously challenging problem. We propose a unified and modular convex optimization framework, relying on second-order cone (SOC) tightening, to encode hard affine SDP constraints on function derivatives, for models belonging to vector-valued reproducing kernel Hilbert spaces (vRKHSs). The modular nature of the proposed approach allows to simultaneously handle multiple shape constraints, and to tighten an infinite number of constraints into finitely many. We prove the convergence of the proposed scheme and that of its adaptive variant, leveraging geometric properties of vRKHSs. Due to the covering-based construction of the tightening, the method is particularly well-suited to tasks with small to moderate input dimensions. The efficiency of the approach is illustrated in the context of shape optimization, robotics and econometrics.Pierre-Cyril Aubin-Frankowski, Zoltan Szabowork_bcuvu4iayzhjzpkfbfouvnthiqTue, 26 Jul 2022 00:00:00 GMTRelaxing strong compatibility at atomistic-continuum interface: Introduction to consistent linear coupling method
https://scholar.archive.org/work/hgsfidzgrfbddk2ptvqaxxfujq
The most essential concept in concurrent multiscale methods involving atomistic-continuum coupling is how to define the relation between atomistic and continuum regions. A well-known coupling method that has been frequently employed in different concurrent multiscale methods such as Quasicontinuum is the strong compatibility coupling (SCC). Although the SCC is a highly accurate coupling method, it constrains the mesh generation and restricts the reduction of computational cost. In this paper, first, we explain the notion of coupling models through the interface in the context of continuum mechanics for quasi-static problems. Then, the SCC is relaxed to overcome the downsides in the following approaches: a surface approximation approach and a force approximation approach. Based on the latter, we develop a brand new coupling method called consistent linear coupling (CLC). Overall, six different coupling schemes are introduced in line with the surface and force approximation approaches. The schemes are compared in terms of solving quasi-static 3D elastic nanoscale contact between an aluminum substrate and a diamond semi-sphere. Numerical results reveal that the CLC-based schemes are more accurate when compared with the surface approximation schemes. Furthermore, we demonstrate that by decreasing the size of interface elements, the accuracy of the CLC converges to and even exceeds the accuracy of SCC, but nevertheless with significantly less computational cost. In other words, in contrast to the SCC, the accuracy of the CLC is tunable, and it can be optimized proportional to the computational cost and accuracy. Finally, we sketch the idea of how the CLC can make the consistency near the atomistic-continuum interface by eliminating ghost forces. The energy of a one-dimensional atomic chain with a finite range of interaction is relaxed to validate the CLC method.Pouya Towhidi, Manouchehr Salehiwork_hgsfidzgrfbddk2ptvqaxxfujqMon, 25 Jul 2022 00:00:00 GMTMulti-Stage Heavy Quark Transport in Ultra-relativistic Heavy-ion Collisions
https://scholar.archive.org/work/asulvlzienfnngbuxvoorj4jay
The quark gluon plasma (QGP) is one of the most interesting forms of matter providing us with insight on quantum chromodynamics (QCD) and the early universe. It is believed that the heavy-ion collision experiments at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) have created the QGP medium by colliding two heavy nuclei at nearly the speed of light. Since the collision happens really fast, we can not observe the QGP directly. Instead, we look at the hundreds or even thousands of final hadrons coming out of the collision. In particular, jet and heavy flavor observables are excellent probes of the transport properties of such a medium. On the theoretical side, computational models are essential to make the connections between the final observables and the plasma. Previously studies have employed a comprehensive multistage modeling approach of both the probes and the medium. In this dissertation, heavy quarks are investigated as probes pf the QGP. First, the framework that describes the evolution of both soft and hard particles during the collision is discussed, which includes initial condition, hydrodynamical expansion, parton transport, hadronization, and hadronic rescattering. It has recently been organized into the Jet Energy-loss Tomography with a Statistically and Computationally Advanced Program Envelope (JETSCAPE) framework, which allows people to study heavy-ion collision in a more systematic manner. To study the energy loss of hard partons inside the QGP medium, the linear Boltzmann transport model (LBT) and in medium DGLAP evolution (implemented in the MATTER model) are combined and have achieved a simultaneous description of both charged hadron, D meson, and inclusive jet observables. To further extract the transport coefficients, a Bayesian analysis is conducted which constrains the parameters in the transport models.Wenkai Fanwork_asulvlzienfnngbuxvoorj4jayMon, 25 Jul 2022 00:00:00 GMTFour point functions in momentum space and topological terms in gravity
https://scholar.archive.org/work/2gdfmmqvtjbslm7l7z55ataqie
In the first part, we concentrate on CFTs in coordinate space. We lay the foundations of Conformal Field Theory and we also demonstrate a method where by using the embedding formalism we can derive up to n-point scalar conformal correlators. We proceed with our analysis in momentum space and we illustrate the theory of the conformal anomalies. We move on to analyse the renormalization of the correlators through counterterms followed by a discussion of the anomaly action. In the second part of the thesis. we derive and analyze the conformal Ward identities (CWIs) of a tensorial 4-point function of a generic CFT in momentum space. The correlator involves the stress-energy tensor T and three scalar operators O (TOOO). We derive the structure of the corresponding CWIs in two different sets of variables, relevant for the analysis of the 1-to-3 (1 graviton → 3 scalars) and 2-to-2 (graviton + scalar → two scalars) scattering processes. Then, we move on to another conformal correlator, the one made of four stress-energy tensors. We elaborate on the structure of the conformal anomaly effective action up to 4-th order, in an expansion in the gravitational fluctuations (h) of the background metric, in the flat spacetime limit. We discuss the renormalization of 4-point functions containing insertions of stress-energy tensors (4T), in conformal field theories in four spacetime dimensions. Finally, we include an analysis on the topological terms that are involved in the renormalization and consequently corrections of gravitational theories.Dimosthenis Theofilopouloswork_2gdfmmqvtjbslm7l7z55ataqieMon, 25 Jul 2022 00:00:00 GMTAugusta Taurinorum, la fondazione della colonia e l'archeoastronomia di Heinrich Nissen
https://scholar.archive.org/work/dc5h6axmyfgadlg2rfmk6au3iy
La colonia romana di Augusta Taurinorum è all'origine di Torino. Dopo qualche parola per illustrare la fondazione, ed aver fornito riferimenti bibliografici relativi, si discutono le proposte, quella da me fatta nel 2012 e altre seguenti, che indicano o pretendono datazioni archeoastronomiche. Si presterà particolare attenzione agli scritti dello storico tedesco Heinrich Nissen sulla planimetria della città romana. Il suo Das Templum del 1869 ci porterà ad analizzare che cosa è lo spazio inaugurato – detto templum – dove i Romani interrogavano il divino. Nel libro di Nissen troviamo infatti la città immaginata come un templum, con il decumano – la via principale della città romana - orientato verso il sorgere del sole il giorno di fondazione. Vedremo anche come Nissen associ tale Dies Natalis ad una festa. Nissen pare essere il primo ad aver associato decumano, sorgere del sole, feste del calendario romano. Il Das Templum venne criticato in passato, con critiche ben fondate, che dicono che la città non è un templum. Tutto ciò è stato dimenticato. Nel 2007, un articolo di Giulio Magli, che ripropone senza citare Nissen il decumano orientato col sorgere del sole un dì di festa, ha portato ad un revival di ipotesi archeoastronomiche sulla città di Torino. Si discuteranno anche le proposte relative al giorno, nella lunga sequenza legale e religiosa caratterizzante il processo di fondazione di una colonia, che i coloni celebravano come Dies Natalis. Si citerà anche una lezione di Friedrich Nietzsche. Di fatto, il lavoro di Nissen e poi di Nietzsche sono i primi studi di filologia Greca e Latina sull'orientazione solare che coinvolgano puntualmente, in particolare quello di Nissen, gli scritti degli agrimensori romani. Non si parlerà solo di orientamenti solari e di archeoastronomia. Quando necessario si introdurranno delle note per chiarire il contesto. Si discuterà in dettaglio la centuriazione di Torino, fornendo letteratura relativa. Si discuterà una datazione della città alle None di Febbraio. Per la fondazione di [...]Amelia Carolina Sparavignawork_dc5h6axmyfgadlg2rfmk6au3iySat, 23 Jul 2022 00:00:00 GMT