nLab
principal submatrix

Contents

Context

Linear algebra

homotopy theory, (∞,1)-category theory, homotopy type theory

flavors: stable, equivariant, rational, p-adic, proper, geometric, cohesive, directed

models: topological, simplicial, localic, …

see also algebraic topology

Introductions

Definitions

Paths and cylinders

Homotopy groups

Basic facts

Theorems

Contents

Definition

Given an index set I and a matrix A=(A ij) i,jIA = (A_{i j})_{i,j \in I}, a principal submatrix of AA is a matrix of the form (A ij) i,jI(A_{i j})_{i,j \in I'} for III' \subset I some subset.

Created on April 23, 2021 at 15:00:22. See the history of this page for a list of all contributions to it.