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Unsure of how this is read

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  1. Jan 10, 2015 #1
    1. The problem statement, all variables and given/known data
    Hi, the problem is, I'm unsure of how this is read. The context is that I'm currently reading on group homomorphisms and they use this notation. I think it is also used in composition of functions, but I'm unsure of how it is read there as well.

    h:X-->Y

    So how would I say h:X-->Y?

    2. Relevant equations
    None
    3. The attempt at a solution
    Searched for a significant time span.
     
  2. jcsd
  3. Jan 10, 2015 #2

    Stephen Tashi

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    "h:X-->Y" means "h is a function with domain X and codomain Y"

    People read this informally in various ways:

    or "h is a function mapping X into Y"

    or "h is a function from X into Y"

    or "h maps X into Y"
     
  4. Jan 10, 2015 #3
    Thank you so much.
     
  5. Jan 11, 2015 #4

    HallsofIvy

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    Staff Emeritus
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    Since you are "reading on group homomorphisms" you might interpret that as meaning "h is a homomorphism from group X to group Y".
     
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