Results 131 to 140 of about 3,252 (223)

The CW Decomposition of the Grassmannian Manifold

open access: yes, 2022
https://rdc.reed.edu/v1/resources/b71a7dbb-5da9-4361-9b5a-44305af42e98/thumb/128.jpgThis paper presents the standard CW decomposition of the real Grassmannian manifold.
Luce, Anna
core  

Strategy for Non-Orthogonal Multiple Access and Performance in 5G and 6G Networks. [PDF]

open access: yesSensors (Basel), 2023
Al-Dulaimi OMK   +3 more
europepmc   +1 more source

A straightening law for the Drinfel'd Lagrangian Grassmannian [PDF]

open access: yes, 2009
The Drinfel d Lagrangian Grassmannian compacti es the space of algebraic maps of xed degree from the projective line into the Lagrangian Grassmannian.
Ruffo, James Vincent
core  

The affine Grassmannian as a presheaf quotient

open access: yesComptes Rendus. Mathématique
For a reductive group $G$ over a ring $A$, its affine Grassmannian $\operatorname{Gr}_G$ plays important roles in a wide range of subjects and is typically defined as the étale sheafification of the presheaf quotient $LG/L^+G$ of the loop group $LG$ by ...
Česnavičius, Kęstutis
doaj   +1 more source

Theta Positivity in Lagrangian Grassmannian

open access: yes
We study the theta nonnegative part of Lagrangian Grassmannian. We show that it admits an orbital decomposition and is homeomorphic to a closed ball. We compare it with other positive structures. We show that it contains several totally nonnegative parts
Xie, Kaitao
core  

A Sagbi Basis for the Quantum Grassmannian

open access: yes, 1999
The maximal minors of a p\Theta(m+p)-matrix of univariate polynomials of degree n with indeterminate coefficients are themselves polynomials of degree np. The subalgebra generated by their coefficients is the coordinate ring of the quantum Grassmannian,
Frank Sottile, Bernd Sturmfels
core  

Sparse Grassmannian Design for Noncoherent Codes via Schubert Cell Decomposition

open access: yesIEEE Open Journal of the Communications Society
In this paper, we propose a method for designing sparse Grassmannian codes for noncoherent multiple-input multiple-output systems. Conventional pairwise error probability formulations under uncorrelated Rayleigh fading channels fail to account for rank ...
Joe Asano   +5 more
doaj   +1 more source

The essential Lagrangian–Grassmannian and the homotopy type of the Fredholm Lagrangian–Grassmannian

open access: yes, 2006
Let H be a separable infinite dimensional Hilbert space endowed with a symplectic structure and let L0⊂H be a Lagrangian subspace. Using the results of [A. Abbondandolo, P.
Eidam, J.C.C., Piccione, P.
core   +1 more source

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