Source: www.puzzletweeter.com
Problem:
Let A,B be 2x2 matrices with integer entries.Suppose the matrices A,A+B,A+2B,A+3B,A+4B are all invertible and their inverses are also integer matrices.
Then show that A+5B is invertible and it'...
Source: www.puzzletweeter.com
Problem:
Let A,B be 2x2 matrices with integer entries.Suppose the matrices A,A+B,A+2B,A+3B,A+4B are all invertible and their inverses are also integer matrices.
Then show that A+5B is invertible and it's inverse is an integer matrix.
score: 1
about 2 hours ago