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Math Help - How to type the symbol for permutation?

  1. #1
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    How to type the symbol for permutation?

    like combination/choose, nCr is n \choose r
    what about for permutation, nPr?

    I can't seem to find the code for it. Thanks!
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  2. #2
    Moo
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    Hello,

    I've went to wikipedia, so excuse me if it doesn't correspond to the writing you know..

    _{n} P_{r} : _{n} P_{r}

    Or sometimes : P_{r}^{n} : P_{r}^{n}
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  3. #3
    MHF Contributor Mathstud28's Avatar
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    Quote Originally Posted by Moo View Post
    Hello,

    I've went to wikipedia, so excuse me if it doesn't correspond to the writing you know..

    _{n} P_{r} : _{n} P_{r}

    Or sometimes : P_{r}^{n} : P_{r}^{n}
    Yeah I think that Moo is correct...that is what I use to represent permuatation here
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  4. #4
    Lord of certain Rings
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    For "choose" , I generally use [tex]n \choose r [/tex].
    However there is an alternative, which Plato uses:[tex]{\binom{n}{r}} [/tex] which also gives {\binom{n}{r}}

    Why would they keep 2 symbols for the same representation
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  5. #5
    Moo
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    Perhaps some people don't know about the probability one but know about the polynomial one ? Or vice-versa ?
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