(no subject)

[ragnus]

question #4:
-prove theorems 52, 53, 58.
-Show that the product of two unitary matrices is unitary.
-Under what conditions is the product of two hermitian matrices hermitian?
-Is the sum of two unitary matrices unitary?
-Is the sum of two hermitian matrices hermitian?

since when does 1 question turn into.. seven questions? ugh.