The tensor square conjecture asserts that, for each positive integer
except 2, 4, and 9, some irreducible complex representation of
has a tensor square containing every irreducible
representation of
. In partition notation, it
asks for a single
such that
for every .
The partition
must be self-conjugate, since the multiplicity of the
sign representation is zero otherwise. For example,
works for
.
Saxl's conjecture specifies a staircase partition when
is triangular, a more particular choice than existence of an unspecified partition.