Question: Show that if U is an n à n unitary matrix and |z1| = |z2| = ... = |zn| = 1, then the product is

Show that if U is an n × n unitary matrix and |z1| = |z2| = ... = |zn| = 1, then the product

Show that if U is an n × n unitary

is also unitary.

Z1 0 0.0 0 z200 0 0 0 Zn

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