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THE REFLEX-FREE HULL

2004
*
International journal of computational geometry and applications
*

We propose a

doi:10.1142/s0218195904001548
fatcat:2daehg46qbaa5fr7k7adupyaym
*hull*operator,*the**reflex*-*free**hull*, that allows us to define a 3D analogue to bays in polygons. ...*The**reflex*-*free**hull*is related to identifying cavities in computer aided design and manufacturing, but we sketch examples to indicate that computing a*reflex*-*free**hull*will be a challenging problem. * ... Acknowledgments We thank Herbert Edelsbrunner and Sergei Bespamyatnikh for discussions on*the*relation of this problem to casting and other*hulls*. ...##
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Shooting Permanent Rays among Disjoint Polygons in the Plane

2012
*
SIAM journal on computing (Print)
*

obstacles with a total of n vertices in

doi:10.1137/100804310
fatcat:m2qdeqgnnnbudes7wcykr7u5jm
*the*plane, a permutation of*the**reflex*vertices, and a half-line at each*reflex*vertex that partitions*the**reflex*angle into two convex angles, then*the*convex partitioning ... We present a data structure for ray shooting and insertion in*the**free*space between disjoint polygonal obstacles with a total of n vertices in*the*plane, where each ray starts at*the*boundary of some ... Fig. 8 . 8 (a)*The**reflex*vertices of*the**free*space Cu \ ( P) are marked with empty circles;*the**free*space has two domains D 1 and D 2 . ...##
###
Shooting permanent rays among disjoint polygons in the plane

2009
*
Proceedings of the 25th annual symposium on Computational geometry - SCG '09
*

obstacles with a total of n vertices in

doi:10.1145/1542362.1542372
dblp:conf/compgeom/IshaqueST09
fatcat:rfpvi5zswjhs7bceufibsedcgi
*the*plane, a permutation of*the**reflex*vertices, and a half-line at each*reflex*vertex that partitions*the**reflex*angle into two convex angles, then*the*convex partitioning ... We present a data structure for ray shooting and insertion in*the**free*space between disjoint polygonal obstacles with a total of n vertices in*the*plane, where each ray starts at*the*boundary of some ... Fig. 8 . 8 (a)*The**reflex*vertices of*the**free*space Cu \ ( P) are marked with empty circles;*the**free*space has two domains D 1 and D 2 . ...##
###
Rank 2 Sheaves on Toric 3-Folds: Classical and Virtual Counts

2017
*
International mathematics research notices
*

Connected components of M^T with constant

doi:10.1093/imrn/rnw302
fatcat:m7mdw7acc5cgfb4lp3fkjd6xze
*reflexive**hulls*are isomorphic to products of P^1. ... Let M be*the*moduli space of rank 2 stable torsion*free*sheaves with Chern classes c_i on a smooth 3-fold X. When X is toric with torus T, we describe*the*T-fixed locus of*the*moduli space. ... These*reflexive**hulls*have c 2 = 2. •*The**reflexive**hulls*of Example 4.11. Recall that these*reflexive**hulls*have c 2 = 1. ...##
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Compatibility relations on codes and free monoids

2008
*
RAIRO - Theoretical Informatics and Applications
*

Let X ⊆ A + be a finite set and let B be

doi:10.1051/ita:2008016
fatcat:hlzbwjbadfbzblmd7qhbbhvtj4
*the*base of*the**free**hull*of X. ... Let X ⊆ A + be a finite set and let B be*the*base of*the**free**hull*of X. ...##
###
Page 95 of The Journal of the Royal Anthropological Institute Vol. 17, Issue 1
[page]

2011
*
The Journal of the Royal Anthropological Institute
*

for

*the*gathering of dispersed information (Hayek 1945;*Hull*2006). ... In*the*process, Hayek laid*the*intellectual cornerstone for*the*foundation of neoclassical economics (*Hull*2006). ...##
###
On nonstandard hulls of convex spaces

1976
*
Canadian Journal of Mathematics - Journal Canadien de Mathematiques
*

*The*question of invariance of nonstandard

*hulls*being equivalent to inductive semi-

*reflexivity*and bounded sets being precompact, is left open. ... If

*the*nonstandard

*hulls*of a TVS are independent of

*the*non-standard model, we say that

*the*TVS has invariant nonstandard

*hulls*. ... Let N be

*the*set of natural numbers and let X be

*the*set or real valued functions on N with finite support. Let °U be a

*free*ultra-filter on N. ...

##
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Cutting Out Polygons with a Circular Saw
[chapter]

2011
*
Lecture Notes in Computer Science
*

This improves

doi:10.1007/978-3-642-25591-5_25
fatcat:hlu7swryg5baplu4aozr7fcl3u
*the*previous approximation ratio of 2.5 obtained by Demaine et al. in 2001. ... Given a simple (cuttable) polygon Q drawn on a piece of planar material R, we cut Q out of R by a (small) circular saw with a total number of cuts no more than twice*the*optimal. ... Each pocket is defined by an edge of*the*convex*hull*, which we call*the*lid of*the*pocket. For each edge of*the*convex*hull*we make a cut along*the*edge. ...##
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CUTTING OUT POLYGONS WITH A CIRCULAR SAW

2013
*
International journal of computational geometry and applications
*

This improves

doi:10.1142/s0218195913600030
fatcat:wpo2zovy3fb6hepu7lzsvph4di
*the*previous approximation ratio of 2.5 obtained by Demaine et al. in 2001. ... Given a simple (cuttable) polygon Q drawn on a piece of planar material R, we cut Q out of R by a (small) circular saw with a total number of cuts no more than twice*the*optimal. ... Each pocket is defined by an edge of*the*convex*hull*, which we call*the*lid of*the*pocket. For each edge of*the*convex*hull*we make a cut along*the*edge. ...##
###
Wind Tunnel Investigation into the Resistance Analysis of Slender Body Catamaran

2020
*
Kapal
*

Pressure around

doi:10.14710/kapal.v17i2.29867
fatcat:wn3i4j5sf5bbzjxndacgnbevyq
*the**hull*was measured using pressure tappings and*the*flow velocity behind*the**hull*was also measured using a Pitôt-static tube. ...*The*tests demonstrated a viscous interaction between*the**hulls*, and form factors for*the*monohull and catamaran are derived. ... Acknowledgements*The*first authors wished to thank*the*Directorate of Research and Community Engagement (DPRM) of*the*Institut Teknologi Sepuluh Nopember (ITS), which funded part of*the*work under a research ...##
###
Numerical Investigation into the Pressure and Flow Velocity Distributions of a Slender-Body Catamaran Due to Viscous Interference Effects

2021
*
International Journal of Technology
*

Pressure and flow velocity around

doi:10.14716/ijtech.v12i1.4269
fatcat:vwc3epe5zff75hvecmjldnhmfy
*the**hull*were measured to obtain a fluid effect attributed to*the*influence of catamaran*hull*interference. ...*The*form factor for*the*catamaran was consistently higher than*the*demihull, suggesting some viscous interference between*the**hulls*. ... Acknowledgements*The*authors wish to thank*the*Ministry of Research, Technology, and Higher Education (Kemristekdikti) and*the*Institut Teknologi Sepuluh Nopember (ITS) for funding*the*current work under ...##
###
Page 65 of Psychological Bulletin Vol. 34, Issue 2
[page]

1937
*
Psychological Bulletin
*

If

*the*principles discovered in conditioned response 5 While*Hull*does not use*the**reflex*as a building-block, his S-R diagrams indicate that this position is not entirely*free*from elementarism. ... Complex behavior is deduced from principles of action discovered in conditioned response experi- ments ; it is not synthesized by an assemblage of simple conditioned*reflexes*,*Hull*(87, p. 227).° As we ...##
###
Page 65 of Psychological Bulletin Vol. 34, Issue 2
[page]

1937
*
Psychological Bulletin
*

If

*the*principles discovered in conditioned response 5 While*Hull*does not use*the**reflex*as a building-block, his S-R diagrams indicate that this position is not entirely*free*from elementarism. ... Complex behavior is deduced from principles of action discovered in conditioned response experi- ments ; it is not synthesized by an assemblage of simple conditioned*reflexes*,*Hull*(87, p. 227).° As we ...##
###
Algebra and local presentability: how algebraic are they? (A survey)

2017
*
Tbilisi Mathematical Journal
*

This is a survey of results concerning

doi:10.1515/tmj-2017-0113
fatcat:7lvwu47hqbek7ob4cqnererava
*the*algebraic*hulls*of two 2-categories: VAR,*the*2- category of finitary varieties, and LFP,*the*2-category of locally finitely presentable categories. ... We are grateful to*the*referee for suggestions which improved our presentation. ...*The**free*completion of a category K under sifted colimits is denoted Sind K 2.4 Proposition. ([7]) For every category K with finite coproducts Sind K is obtained by completing Ind K freely under*reflexive*...##
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Ehrhart series, unimodality, and integrally closed reflexive polytopes
[article]

2014
*
arXiv
*
pre-print

In this paper, we consider integrally closed

arXiv:1403.5378v3
fatcat:i3gf52ju4nh45jep2sb3ah4mcq
*reflexive*simplices and discuss an operation that preserves*reflexivity*, integral closure, and unimodality of*the*h^*-vector, providing one explanation for ... We also discuss*the*failure of proving unimodality in this setting using weak Lefschetz elements. ... that are*the*convex*hull*of*the*origin and all but one of*the*vertices of ∆ Q . ...
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