MHB Understanding the Cauchy-Schwarz Inequality

Joe20
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I am not sure what examples to give, need help on this. Have attached the theorem as well.
 

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You need to give an example of (i) a divergent sequence that is increasing but not bounded above, and (ii) a divergent sequence that is bounded above but not increasing. This will show that both conditions (increasing and bounded) are needed for the theorem to hold.
 

Thread '2-sphere intrinsic definition by gluing disks' boundaries'

A sphere as topological manifold can be defined by gluing together the boundary of two disk. Basically one starts assigning each disk the subspace topology from ##\mathbb R^2## and then taking the quotient topology obtained by gluing their boundaries. Starting from the above definition of 2-sphere as topological manifold, shows that it is homeomorphic to the "embedded" sphere understood as subset of ##\mathbb R^3## in the subspace topology.
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