Invertible Matrix Theorem -- from Wolfram MathWorld
The condition number of an invertible matrix ||A|| | Chegg.com
Invertible Matrices: Theorems, Properties and Examples
SOLVED: Find conditions on k that will make the matrix invertible . To enter your answer; first select 'always" never or whether k should be equal or not equal to specific values
Invertible and noninvertibles matrices - YouTube
Student reasoning about the invertible matrix theorem in linear algebra | SpringerLink