History of Semigroup/Talk

	Revision 2 . . November 17, 2001 12:36 pm by AxelBoldt [number of semigroups]
	Revision 1 . . November 17, 2001 12:04 pm by (logged).109.250.xxx [question about number of semigroups of a given finite order]

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Added: 1a2,5

:I doubt that there's a known formula. *http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=A023814 for the total number of semigroups on a set with n elements *http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=A027851 for the number of non-isomorphic semigroups with n elements --AxelBoldt