12/01/12

explain why the negation of an if then statement can not be an if then statement

This is about negations of if then statements and why they can't be if then statements.

11/27/12

Prove that lim(n->infinity) (1/n) = 0. Make a proof with definition of limit.

Make a proof about definition of limit.

Prove that Z x Z is countable

This is a proof or a disproof with a salvage.

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