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Tensor Square Conjecture


The tensor square conjecture asserts that, for each positive integer n except 2, 4, and 9, some irreducible complex representation of S_n has a tensor square containing every irreducible representation of S_n. In partition notation, it asks for a single lambda|-n such that

 g(lambda,lambda,nu)>0

for every nu|-n. The partition lambda must be self-conjugate, since the multiplicity of the sign representation is zero otherwise. For example, (2,1) works for n=3.

Saxl's conjecture specifies a staircase partition when n is triangular, a more particular choice than existence of an unspecified partition.


See also

Kronecker Coefficient, Saxl Conjecture, Specht Module, Symmetric Group

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References

Pak, I.; Panova, G.; and Vallejo, E. "Kronecker Products, Characters, Partitions, and the Tensor Square Conjectures." Adv. Math. 288, 702-731, 2016. https://doi.org/10.1016/j.aim.2015.11.002.Sagan, B. E. The Symmetric Group: Representations, Combinatorial Algorithms, and Symmetric Functions, 2nd ed. New York: Springer, 2001. https://doi.org/10.1007/978-1-4757-6804-6.

Cite this as:

Weisstein, Eric W. "Tensor Square Conjecture." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/TensorSquareConjecture.html

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