matricies Flashcards
1
Q
what makes a matrix skew symmetric
A
A’ = -A
2
Q
what makes a matrix symmetric
A
if A’ = A
3
Q
how to multiply matricies
A
row x colum
4
Q
what must be equal to be able to multiply two matricies
A
number of columns in first one must be equal to number of rows in the second
5
Q
when is a matrix singular
A
if the determinant is 0
6
Q
what gives an identitiy matrix
A
A A^(-1)
A^(-1) A
7
Q
A
