Results 81 to 90 of about 36,312 (298)
Representation type via Euler characteristics and singularities of quiver Grassmannians [PDF]
, 2017 In this text, we characterize the representation type of an acyclic quiver by the properties of its associated quiver Grassmannians. This characterization utilizes and extends known results about singular quiver Grassmannians and cell decompositions into affine spaces.
arxiv +1 more source
T-system on T-hook: Grassmannian solution and twisted Quantum Spectral Curve [PDF]
, 2015 A bstractWe propose an efficient grassmannian formalism for solution of bi-linear finite-difference Hirota equation (T-system) on T-shaped lattices related to the space of highest weight representations of gl(K1, K2|M ) superalgebra.
V. Kazakov, S. Leurent, D. Volin
semanticscholar +1 more source
Finite Fields and Their ApplicationsConsider the point line-geometry ${\mathcal P}_t(n,k)$ having as points all the $[n,k]$-linear codes having minimum dual distance at least $t+1$ and where two points $X$ and $Y$ are collinear whenever $X\cap Y$ is a $[n,k-1]$-linear code having minimum dual distance at least $t+1$.
Ilaria Cardinali, Luca Giuzzi
openaire +3 more sources
Estimation of the Error Structure in Multivariate Response Linear Regression Models
WIREs Computational Statistics, Volume 17, Issue 2, June 2025.ABSTRACT Multivariate response linear regression model considers how a set of covariates affects multiple responses. In contrast to separately running univariate regression for each response, multivariate response regression can better estimate the coefficient matrix by exploiting shared information among the responses.
Ruobin Liu, Guo Yu
wiley +1 more source
Positivity, Grassmannian geometry and simplex-like structures of scattering amplitudes
Journal of High Energy Physics, 2017 This article revisits and elaborates the significant role of positive geometry of momentum twistor Grassmannian for planar N=4 $$ \mathcal{N}=4 $$ SYM scattering amplitudes.
Junjie Rao
doaj +1 more source
A note on NMHV form factors from the Graßmannian and the twistor string [PDF]
, 2017 A bstractIn this note we investigate Graßmannian formulas for form factors of the chiral part of the stress-tensor multiplet in N=4$$ \mathcal{N}=4 $$ superconformal Yang-Mills theory.
David Meidinger +3 more
semanticscholar +1 more source
Expanding the Family of Grassmannian Kernels: An Embedding Perspective
, 2014 Modeling videos and image-sets as linear subspaces has proven beneficial for many visual recognition tasks. However, it also incurs challenges arising from the fact that linear subspaces do not obey Euclidean geometry, but lie on a special type of ...
B. Kulis +10 more
core +1 more source
On embedded products of Grassmannians
Discrete Mathematics, 2003 Let $Γ'$ and $Γ$ be two Grassmannians. The standard embedding $ϕ:Γ'\timesΓ\to \bar{P}$ is obtained by combining the Plücker and Segre embeddings. Given a further embedding $η: Γ'\timesΓ\to P'$, we find a sufficient condition for the existence of $α\in Aut(Γ)$ and of a collineation $ψ: \bar{P} \to P'$ such that $η=({\rm id}_{Γ'}\timesα)ϕψ$.
H. HAVLICEK, ZANELLA, CORRADO
openaire +3 more sources
ENDMEMBER EXTRACTION ON THE GRASSMANNIAN [PDF]
2018 IEEE Data Science Workshop (DSW), 2018 Endmember extraction plays a prominent role in a variety of data analysis problems as endmembers often correspond to data representing the purest or best representative of some feature. Identifying endmembers then can be useful for further identification and classification tasks. In settings with high-dimensional data, such as hyperspectral imagery, it
Henry Kvinge +3 more
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Totally nonnegative Grassmannians, Grassmann necklaces, and quiver Grassmannians
Canadian Journal of Mathematics, 2022 AbstractPostnikov constructed a cellular decomposition of the totally nonnegative Grassmannians. The poset of cells can be described (in particular) via Grassmann necklaces. We study certain quiver Grassmannians for the cyclic quiver admitting a cellular decomposition, whose cells are naturally labeled by Grassmann necklaces. We show that the posets of
Feigin E., Lanini M., Putz A.
openaire +3 more sources