Recent content by afirican

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    News House votes down bail-out package

    It sounds like idiot Pelosi threw a wrench in the spokes by making a very partisan statement. You would think by the time you get to her level you'd know you get more bees with honey than vinegar. Maybe Pelosi will learn to keep her mouth shut, and maybe ACORN will be dropped as a beneficiary...
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    How can we show that x^m is in a normal subgroup N of G if |G/N| = m?

    If N is a normal subgroup of G and |G/N| = m, show that x^m is in N for all x in G
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    Prove that Q under addition is not isomorphic to R+

    I think I know the answer. If I say that any map between Q and R+ is not onto, is that enough?
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    Prove that Q under addition is not isomorphic to R+

    You're totally right. Then is there any way to show that Q and R+ are not isomorphic?
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    Prove that Q under addition is not isomorphic to R+

    Why f:Q -> R+, f(x) = exp(x) is not onto? For all r of R+, there exists r' = lnr in Q such that r = exp(lnr) = exp(r') = f(r'). Where do I go wrong?
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    Prove that Q under addition is not isomorphic to R+

    Isn't it f(x) = exp(x) a bijection between Q and R+?
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    Prove that Q under addition is not isomorphic to R+

    How do I prove that Q under addition is not isomorphic to R+ under multiplication?
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