fix typo: middle dot

This commit is contained in:
shfshanyue 2017-03-09 19:43:23 +08:00
parent e0a7e75f7a
commit b58ed9bea6

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@ -331,7 +331,7 @@ To be a valid category 3 rules must be met:
and `f` is a morphism from `a -> b`, and `g` is a morphism from `b -> c`;
`g(f(x))` must be equivalent to `(g • f)(x)`.
3. Composition must be associative
`f • (g • h)` is the same as `(f • g) * h`
`f • (g • h)` is the same as `(f • g) h`
Since these rules govern composition at very abstract level, category theory is great at uncovering new ways of composing things.