JOURNAL OF
ALGEBRAIC
COMBINATORICS

Home > Vol 28, No 4 (2008)

Kevin Purbhoo

University of Waterloo 200 University Ave. W. Waterloo ON N2L 3G1 Canada

We define mosaics, which are naturally in bijection with Knutson-Tao puzzles. We define an operation on mosaics, which shows they are also in bijection with Littlewood-Richardson skew-tableaux. Another consequence of this construction is that we obtain bijective proofs of commutativity and associativity for the ring structures defined either of these objects. In particular, we obtain a new, easy proof of the Littlewood-Richardson rule. Finally we discuss how our operation is related to other known constructions, particularly jeu de taquin.

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