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Localization of generalized eigenvalues by Cartesian ovals

V. Kostić, R. S. Varga, L. Cvetković
2011 Numerical Linear Algebra with Applications  
We will obtain here an improved approximation, and using the concept of generalized diagonal dominance, we prove that the new approximation has some of the basic properties of the original Geršgorin set  ...  A sufficient condition for the singularity of a matrix pair .A, B/ is that the matrices A and B have overlapping null spaces, meaning that there exists a nonzero vector x in the null spaces of both A  ...  This work was partially supported by the Ministry of Science of Republic of Serbia, grant 174019, and Autonomous Province of Vojvodina, Secretariat for Science and Technological Development, grants 0702  ... 
doi:10.1002/nla.801 fatcat:h6547l6q25d5throcyuahcygw4

The Classification of Skulls

Harrison Allen
1895 Science  
B-Oval or Oidocephalic Form. NORMA VERTICALIS. 1. Ellipsoid (ellipsoides). 2. Pentagonoid (pentagonoides). 3. Rhomboid (rhomboides). 4. Ovoid (ovoides). 5. Sphenoid (sphenoides). 6.  ...  PHILADELPHIA, March 16, 1895. SCIENCE . SCIENCE CORRESPONDENCE. THE CLASSIFICATION OF SKULLS.  ... 

Stage-specific and species-specific antigens of Plasmodium vivax and Plasmodium ovale defined by monoclonal antibodies

P M Andrysiak, W E Collins, G H Campbell
1986 Infection and Immunity  
Five of the anti-P. vivax MAbs and three of the anti-P. ovale MAbs also reacted with sporozoites.  ...  Monoclonal antibodies (MAbs) were produced against the asexual blood stages of Plasmodium vivax and Plasmodium ovale and used to define antigens of plasmodial parasites in an indirect fluorescent antibody  ...  This investigation was supported in part by the U.S.  ... 
pmid:3536743 pmcid:PMC260212 fatcat:6sh6ba7xsfcdjlr7zg475rnhby

Topological classification of real Enriques surfaces

Alexander Degtyarev, Viatcheslav Kharlamov
1996 Topology  
WE COMPLETE the classification of the topological types of real Enriques surfaces started by V. Nikulin. The resulting list contains 87 topological types.  ...  is obtained by forming (r -2) ovals in one half of YR and (s -2) ovals in the other half. 5.3.  ...  As is shown in [6], the kernel Ker (A* : H2(X'; H/2) + H2(X; Z/2)) is generated by the elements realized by the components of X,.  ... 
doi:10.1016/0040-9383(95)00038-0 fatcat:f27ags6c6jeltgeqmtjinsvwda

Studies on classification of eel leucocytes

Riichi Kusuda, Yuji Ikeda
1987 Nippon Suisan Gakkaishi  
The types of leucocytes revealed in this study are the same as those described by xidase granules is often used. 2, 4, 6, 16) The results of this study showed only a few neutrophils with peroxidase positive  ...  These differences may be caused by the method used for classification.  ... 
doi:10.2331/suisan.53.205 fatcat:2svvtydp4vdnzpeqh5zyxkcqum

Symmetric plane curves of degree 7 : pseudo-holomorphic and algebraic classifications [article]

Erwan Brugalle
2006 arXiv   pre-print
We give a classification of real schemes (resp. complex schemes) realizable by symmetric real curves of degree 7 with respect to the type of the curve (resp. M-symmetric real curves of degree 7).  ...  In particular, we exhibit two real schemes which are realizable by real symmetric dividing pseudoholomorphic curves of degree 7 on the projective plane but not by algebraic ones.  ...  An injective pair of ovals in RP 2 is called positive if the orientations of the two ovals are induced by one of the orientations of the annulus in RP 2 bounded by the two ovals, and negative otherwise  ... 
arXiv:math/0404030v3 fatcat:qrsdqghfujhete2a7jwj7lxn4y


Agus Suharyanto
2020 International Journal of GEOMATE  
Four categories of watershed shapes (circular, oval, semi-oval, and elongated) were applied in this research.  ...  Seventeen watersheds at Serayu-Bogowonto river basin were selected as samples in the classification process.  ...  This research work has been accomplished under a research grant provided by Universitas Brawijaya for the project titled "Doctor Associate Professor Research Grant in 2019 budged years".  ... 
doi:10.21660/2020.74.58650 fatcat:xzszrz3eire3zauyqpxz24bv2u

On the classification of hyperovals [article]

Florian Caullery, Kai-Uwe Schmidt
2014 arXiv   pre-print
A hyperoval in the projective plane $\mathbb{P}^2(\mathbb{F}_q)$ is a set of $q+2$ points no three of which are collinear.  ...  Hyperovals have been studied extensively since the 1950s with the ultimate goal of establishing a complete classification.  ...  By a theorem due to Segre [17] , every oval in P 2 (F q ) of odd order is a conic, which at once classifies ovals in P 2 (F q ) for odd q.  ... 
arXiv:1403.2880v2 fatcat:5n5634cdhzcd7jzhw5xnkduumy

Ultrastructural Classification of Pituitary Adenomas

E. Horvath, K. Kovacs
1976 Canadian Journal of Neurological Sciences  
Number and size of secretory granules varied considerably among tumors composed of the same cell type indicating that pituitary tumor classification cannot be based solely on granule morphology.  ...  Distinct differences in fine structural appearances permitted their separation into 5 classes: 1) Growth hormone, (GH)-cell tumors; 2) Prolactin cell tumors; 3) Mixed adenomas composed of GH and prolactin  ...  These studies, however, failed to result in a satisfactory classification of chromophobe tumors by light microscopy.  ... 
doi:10.1017/s0317167100025944 fatcat:iosf3fvklrajbp7v4pkg4zxvwa

Classification of flocks of the quadratic cone in PG(3,64) [article]

Giusy Monzillo, Tim Penttila, Alessandro Siciliano
2022 arXiv   pre-print
The classification proceeds via the connection between flocks and herds of ovals in PG(2,q), q even, and uses the prior classification of hyperovals in PG(2,64).  ...  We complete the classification of flocks of the quadratic cone in PG(3,q) for q <= 71, by showing by computer that there are exactly three flocks of the quadratic cone in PG(3,64), up to equivalence.  ...  It is clear that the most convenient model to approach this classification from this perspective is that of herds of ovals of PG (2, 64) .  ... 
arXiv:2205.05344v1 fatcat:voi5zg4f7vajvdt6ko7mks65va


F. F. Blackman, A. G. Tansley
1902 New Phytologist  
Colonies of 2-8 rather large cells, very various in shape and bearing irregular spines by which they are aggregated. 16. Botryococcus. Kiitzing.  ...  Colonies consisting of oval cells grouped to form more or less tree-like clusters by the united but not confluent remains of the mother cell walls.  ... 
doi:10.1111/j.1469-8137.1902.tb06558.x fatcat:sieshhpevbcjfnycud3h5w7jrq


W W Ford
1916 Journal of Bacteriology  
The extent to which this classification is of permanent value will be shown, we believe, by the approval or disapproval with which it is received by American bacteriologists.  ...  , and laboratory stock cultures 28 species or varieties of species were isolated and established as distinct types by the usual morphological, developmental, tinctorial and cultural features available  ...  Spores central, excentric or sub-terminal, oval to cylindrical, measuring usually 0.75 to 1.125 by 1.5 to 2 microns.  ... 
pmid:16558715 pmcid:PMC1312521 fatcat:iwvwrdgycvdollz6bba6k4wsxa

Classification and Grading of Canine Mammary Tumors

M. Goldschmidt, L. Peña, R. Rasotto, V. Zappulli
2011 Veterinary pathology  
This article provides a brief overview of the two histologic classification systems.  ...  Since the publication of the second system, several new histologic subtypes of canine mammary neoplasms have been described. These have been incorporated into the proposed new classification system.  ...  The manuscript has also been reviewed and endorsed by the World Small Animal Veterinary Association. We would like to thank both organizations for their support and guidance.  ... 
doi:10.1177/0300985810393258 pmid:21266722 fatcat:ywx2q4dwivf7rkgj7wrqclj7fq

Deformation classification of real non-singular cubic threefolds with a marked line [article]

Sergey Finashin, Viatcheslav Kharlamov
2019 arXiv   pre-print
The first one relates these components to the orbits of the monodromy action on the set of connected components of the Fano surface F_R(X) formed by real lines on X.  ...  We prove that the space of pairs (X,l) formed by a real non-singular cubic hypersurface X⊂ P^4 with a real line l⊂ X has 18 connected components and give for them several quite explicit interpretations  ...  The remaining 6 deformation classes of quintics are distinguished by the number k of ovals and have the codes J ⊔ k, k = 0, 1, 2, 3, 5, 6.  ... 
arXiv:1803.00535v2 fatcat:lplzppfulncunbd7hzeufa7ptm

Classification of joint numerical ranges of three hermitian matrices of size three [article]

Konrad Szymański, Stephan Weis, Karol Życzkowski
2018 arXiv   pre-print
The joint numerical range W(F) of three hermitian 3-by-3 matrices F=(F_1,F_2,F_3) is a convex and compact subset in R^3. Generically we find that W(F) is a three-dimensional oval.  ...  Assuming (W(F))=3, every one- or two-dimensional face of W(F) is a segment or a filled ellipse. We prove that only ten configurations of these segments and ellipses are possible.  ...  The boundary generating curve was also used [16] to find a classification of the numerical range of a 4-by-4 matrix.  ... 
arXiv:1603.06569v3 fatcat:ykd2t3kcdjemlai6g3y4kzu7au
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