Projection Matrix

[rbcc]

if A projection matrix M

then
Mx^T*Mx=Mx

why does this result occur, why isn't it Mx^2?

Thank you,
rbcc

 

[tkhunny]

It may be as you have stated it. Recall that a Projection Matrix has a few interesting features:

Mx = Mx* -- Where Mx* is the Adjoint Matrix

Mx^2 = Mx -- This one may enser your question entirely.