The number of Latin squares of order 11

Details The number of Latin squares of order 11 The number of Latin squares of order 11

2009-09-18

arxiv.org/abs/0909.3402v2

Mathematics

Combinatorics

Minor revision; to appear in Mathematics of Computation

Scientific paper

Constructive and nonconstructive techniques are employed to enumerate Latin squares and related objects. It is established that there are (i) 2036029552582883134196099 main classes of Latin squares of order 11; (ii) 6108088657705958932053657 isomorphism classes of one-factorizations of $K_{11,11}$; (iii) 12216177315369229261482540 isotopy classes of Latin squares of order 11; (iv) 1478157455158044452849321016 isomorphism classes of loops of order 11; and (v) 19464657391668924966791023043937578299025 isomorphism classes of quasigroups of order 11. The enumeration is constructive for the 1151666641 main classes with an autoparatopy group of order at least 3.

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