The Pieri formulas conjecture for Schur superpolynomials

Let sΛs_\Lambda be a Schur superpolynomial indexed by a superpartition, and let (;r)(;r), (r;)(r;), (;1r)(;1^r) and (0;1r)(0;1^r) denote the corresponding bosonic and fermionic row and column superpartitions. For a resulting diagram Ω\Omega, let #\#\ell_\odot be the number of circles in Ω\Omega lying below the newly added circle. Pieri formulas conjecture.

sΛs(;r)=ΩΛ(;r)sΩ,sΛs(r;)=ΩΛ(r;)(1)#sΩ,s_\Lambda s_{(;r)}=\sum_{\Omega\in\Lambda\otimes(;r)}s_\Omega,\qquad s_\Lambda s_{(r;)}=\sum_{\Omega\in\Lambda\otimes(r;)}(-1)^{\#\ell_\odot}s_\Omega,

and

sΛs(;1r)=ΩΛ(;1r)sΩ,sΛs(0;1r)=ΩΛ(0;1r)(1)#sΩ.s_\Lambda s_{(;1^r)}=\sum_{\Omega\in\Lambda\otimes(;1^r)}s_\Omega,\qquad s_\Lambda s_{(0;1^r)}=\sum_{\Omega\in\Lambda\otimes(0;1^r)}(-1)^{\#\ell_\odot}s_\Omega.

These formulas conjecturally describe multiplication by elementary row and column Schur superpolynomials through admissible Pieri diagrams, with signs controlled by fermionic circles; the source gives no resolution status.

Sources & referencesView supporting material

Primary source

Olivier Blondeau-Fournier and Pierre Mathieu, “Schur Superpolynomials: Combinatorial Definition and Pieri Rule”, arXiv:1408.2807 (2015).

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