On 23/04/2012 02:41 PM, clipka wrote:
> Am 23.04.2012 12:19, schrieb Invisible:
>> OK, so "magma" consists of a set S and a binary operator #. The #
>> operator takes any two elements of S (including the possibility of two
>> copies of the same element), and yields a new element of S (possibly the
>> same one you started with).
>
> And here I was thinking that magma consisted of molten minerals...

For extra credit, work out the difference between a semigroup and a 
groupoid. :-P

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