Problem with a concept

sir one more request, can u please explain me the concept of "Completeness of vector space" I have posted this question but didn't got the proper answer.. so I am asking your help

And sir one more thing to clear.. when the pole does not lie on real axis then to convert integration [-inf, inf] to [0,inf] we use "even odd" concept as the whole [-Real,Real] par...

thanks a lot sir. now I understand the concept. but as you can realise solving with this lengthy is really something of headache in Exam hall with in that much limited time. So doe...

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