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#### Yankel

##### Active member
Hello all

I need to prove these 3 statements, and I don't know how to start...

A is an nxn matrix:

thanks...

#### Klaas van Aarsen

##### MHB Seeker
Staff member
Hello all

I need to prove these 3 statements, and I don't know how to start...

A is an nxn matrix:

$$A = P J P^{-1}$$