Abstract Algebra: Schwarz Inequality Homework

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icystrike
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Homework Statement


This is part of the proof of Schwarz inequity.
Please help me understand the following equation , i think it should not be a equal sign instead it should be greater or equal to.

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Homework Equations





The Attempt at a Solution

 

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will someone clear my doubt ? thanks in advance
 
No - the equals is correct. The norm is taken by multiplying out using the dot product (so a x b = aTb).
 
mrbohn1 said:
No - the equals is correct. The norm is taken by multiplying out using the dot product (so a x b = aTb).

Thanks mrbohn. (: