Results 321 to 330 of about 273,287 (378)

Discrete Convexity

Journal of Mathematical Sciences, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Danilov, V. I., Koshevoj, G. A.
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Convexity without convex combinations

Journal of Geometry, 2015
The paper studies the convex geometry of Beckenbach structures into the context of an axiomatic setting, using some of the axioms of the geometry proposed by Hilbert (the axioms of incidence, of betweenness and the axiom of half-plane). Sandwich results are proved for functions which are convex with respect to Beckenbach families.
Bessenyei, Mihály, Popovics, Bella
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Digital Convexity, Straightness, and Convex Polygons

IEEE Transactions on Pattern Analysis and Machine Intelligence, 1982
New schemes for digitizing regions and arcs are introduced. It is then shown that under these schemes, Sklansky's definition of digital convexity is equivalent to other definitions. Digital convex polygons of n vertices are defined and characterized in terms of geometric properties of digital line segments.
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Convexity and liberation at large spin

, 2012
A bstractWe consider several aspects of unitary higher-dimensional conformal field theories (CFTs). We first study massive deformations that trigger a flow to a gapped phase.
Z. Komargodski, A. Zhiboedov
semanticscholar   +1 more source

Monotonicity and convexity involving generalized elliptic integral of the first kind

RACSAM, 2021
Tie-hong Zhao, Miao-Kun Wang, Y. Chu
semanticscholar   +1 more source

The Local Convexity of Solving Systems of Quadratic Equations

, 2015
This paper considers the recovery of a rank r positive semidefinite matrix $${X X^T \in \mathbb{R}^{n\times n}}$$XXT∈Rn×n from m scalar measurements of the form $${y_i := a_i^T X X^T a_i}$$yi:=aiTXXTai (i.e., quadratic measurements of X).
Sujay Sanghavi, Rachel A. Ward, Christopher D. White   +2 more
semanticscholar   +1 more source

Convexity and convex sets

2010
The history of convexity History of convexity is rather astonishing, even paradoxical, and we explain why. On the one hand, the notion of convexity Convexity is extremely natural, so much so that we find it, for example, in works on artArt and anatomyAnatomy without it being defined.
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Finding Convex Sets in Convex Position

Combinatorica, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Convex Non-Convex Segmentation over Surfaces

2017
The paper addresses the segmentation of real-valued functions having values on a complete, connected, 2-manifold embedded in \({{\mathbb {R}}}^3\). We present a three-stage segmentation algorithm that first computes a piecewise smooth multi-phase partition function, then applies clusterization on its values, and finally tracks the boundary curves to ...
HUSKA, MARTIN, LANZA, ALESSANDRO, MORIGI, SERENA, SGALLARI, FIORELLA   +3 more
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Convexity conditions and existence theorems in nonlinear elasticity

, 1976
J. Ball
semanticscholar   +1 more source