The invertible matrix theorem
Intros
Lessons
- The Invertible Matrix Theorem
• only works for square matrices
• If one is true, then they are all true
• If one is false, then they are all false
- How to apply the Invertible Matrix Theorem
• Showing a Matrix is invertible
• Shortcuts to know certain statements
Examples
Lessons
- Showing a Matrix is invertible or not invertible
Is the following matrix invertible?
- Is the following matrix invertible? Use as few calculations as possible.
- Understanding the Theorem
Assume that is a square matrix. Determine if the following statements are true or false: - Can a square matrix with two identical rows be invertible? Why or why not?
- Let and be matrix. Show that if is invertible, so is .