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Math Help - What is this notation

  1. #1
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    What is this notation

    After the f o g and g o f, there is a something and a v.

    What is that?
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  2. #2
    MHF Contributor Drexel28's Avatar
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    Re: What is this notation

    Quote Originally Posted by dwsmith View Post
    After the f o g and g o f, there is a something and a v.

    What is that?
    That is an iota. Usually it indicates an \.
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    Re: What is this notation

    Quote Originally Posted by dwsmith View Post
    After the f o g and g o f, there is a something and a v.

    What is that?

    \iota_V:V \to V, \,\,\,\iota_{V}(x) = x, \,\,\forall x \,\in V.
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  4. #4
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    Re: What is this notation

    normally iota is used for an inclusion morphism. if the sub-object is the same as the target of the morphism (just as any set can be a subset of itself), then this becomes the identity map.
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