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#1 Help Me ! » Adjoint problem please help » 2007-11-15 17:29:56

smith_john
Replies: 0

Would someone help me with this problem?

Give an example of a linear operator T on an inner product space V such that N(T) does not equal N(T*).

#2 Help Me ! » inner product space problem » 2007-11-14 21:57:15

smith_john
Replies: 0

Can anyone give me some help on this problem please?

Let T be a linear operator on an inner product space V. Prove that ll T(x) ll = ll x ll if and only if <T(x), T(y)> = <x,y> for all x, y in V. The hint for this problem is to use the polar identities, but I don't know how to apply it here. I really appreciate if someone can help.

P.S: Sorry, I posted my topic in the wrong section. Please someone remove the other one in Exercises.

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