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Bibliographic Details
Main Authors: Lim, Lek-Heng, Lu, Xiang, Ye, Ke
Format: Preprint
Published: 2025
Subjects:
Online Access:https://arxiv.org/abs/2501.18172
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Table of Contents:
  • We describe a curious structure of the special orthogonal, special unitary, and symplectic groups that has not been observed, namely, they can be expressed as matrix products of their corresponding Grassmannians realized as involution matrices. We will show that $\operatorname{SO}(n)$ is a product of two real Grassmannians, $\operatorname{SU}(n)$ a product of four complex Grassmannians, and $\operatorname{Sp}(2n, \mathbb{R})$ or $\operatorname{Sp}(2n, \mathbb{C})$ a product of four symplectic Grassmannians over $\mathbb{R}$ or $\mathbb{C}$ respectively.