Results 11 to 20 of about 3,117,111 (256)
Matrix Extreme Points and Free extreme points of Free spectrahedra [PDF]
Optim. Methods Softw. 39 (2024) 1263--1308, 2022 A spectrahedron is a convex set defined by a linear matrix inequality, i.e., the set of all $x \in \mathbb{R}^g$ such that \[ L_A(x) = I + A_1 x_1 + A_2 x_2 + \dots + A_g x_g \succeq 0 \] for some symmetric matrices $A_1,\ldots,A_g$. This can be extended to matrix spaces by taking $X$ to be a tuple of real symmetric matrices of any size and using the ...
Epperly, Aidan +3 more
arxiv +3 more sources
Extreme points and saturated polynomials [PDF]
Illinois J. Math. 63, no. 1 (2019), 47-74, 2017 We consider the problem of characterizing the extreme points of the set of analytic functions f on the bidisk with positive real part and f(0)=1. If one restricts to those f whose Cayley transform is a rational inner function, one gets a more tractable problem.
arxiv +7 more sources
Objects as Extreme Points [PDF]
arXiv, 2021 Object detection can be regarded as a pixel clustering task, and its boundary is determined by four extreme points (leftmost, top, rightmost, and bottom). However, most studies focus on the center or corner points of the object, which are actually conditional results of the extreme points.
Junxing Ren +5 more
arxiv +5 more sources
Subordination and extreme-point theory [PDF]
Pacific Journal of Mathematics, 1974 D. J. Hallenbeck, Thomas H. MacGregor
openalex +3 more sources
Error Function and Certain Subclasses of Analytic Univalent Functions [PDF]
Sahand Communications in Mathematical Analysis, 2023 In the present investigation, our main aim is to introduce a certain subclass of analytic univalent functions related to the Error function. We discuss the implications of our main results, including the coefficient bound, extreme points, weighted mean ...
Seyed Hadi Sayedain Boroujeni +1 more
doaj +1 more source
Modeling Under-Reporting in Cyber Incidents
Risks, 2022 Under-reporting in cyber incidents is a well-established problem. Due to reputational risk and the consequent financial impact, a large proportion of incidents are never disclosed to the public, especially if they do not involve a breach of protected ...
Seema Sangari +2 more
doaj +1 more source
Preservation of Extreme Points
Mathematics, 2022 We characterize the extreme points of the closed unit ball of the dual of a Banach space which are preserved by the adjoint of any extreme operator. The result is related to the structure topology introduced by Alfsen and Effros on the set of all extreme points in the dual of any Banach space.
Juan Francisco Mena-Jurado +1 more
openaire +5 more sources
On Bishop–Phelps and Krein–Milman Properties
Mathematics, 2023 A real topological vector space is said to have the Krein–Milman property if every bounded, closed, convex subset has an extreme point. In the case of every bounded, closed, convex subset is the closed convex hull of its extreme points, then we say that ...
Francisco Javier García-Pacheco
doaj +1 more source
Interactive Image Segmentation Technique Based on Improved Residual Network
IEEE Access, 2023 Interactive image segmentation offers useful guidance to users and can be applied in practical settings for production and daily life purposes. Nonetheless, the technology’s intrinsic limitations, including complicated interaction methods and high
Feng Yang, Dan Geng
doaj +1 more source
Warsaw Active-Target TPC: A new detector for photonuclear reactions studies at astrophysical energies [PDF]
EPJ Web of Conferences, 2023 An active-target time-projection chamber (TPC) optimised for studying nuclear reactions of astro-physical interest was developed by the University of Warsaw for studying photo-disintegration reactions using intense, monochromatic γ-ray beams.
Ćwiok Mikolaj +15 more
doaj +1 more source