Other
Identity Matrix and Inverses
Explains what is meant by an identity matrix and why it is important. This is followed by a discussion of inverses. Examples and explanations are very clear. [13:45]
Khan Academy
Khan Academy: Properties of Matrix Multiplication: Zero Matrix
Explains what the zero matrix is and how it is used in matrix multiplication. [4:41]
Khan Academy
Khan Academy: Matrix Multiplication: Identity and Zero Matrix Equation
Models a problem where one must determine whether unknown matrices are zero or identity to make an equation true. [3:58]
Khan Academy
Khan Academy: Properties of Matrix Multiplication: Intro to Identity Matrix
Just as any number remains the same when multiplied by 1, any matrix remains the same when multiplied by the identity matrix. [7:59]
Sophia Learning
Sophia: Zero Determinant: Lesson 3
This lesson goes over matrices with a determinant of zero. It is 3 of 7 in the series titled "Zero Determinant." [2:14]
Sophia Learning
Sophia: Zero Determinant: Lesson 4
This lesson goes over matrices with a determinant of zero. It is 4 of 7 in the series titled "Zero Determinant." [2:44]
Sophia Learning
Sophia: Zero Determinant: Lesson 5
This lesson goes over matrices with a determinant of zero. It is 5 of 7 in the series titled "Zero Determinant." [2:47]