Table-locus equations conjecture for all entries of Zhao's table

Fix Q=(u,ur)Q=(u,u-r) with u>r2u>r\ge2, put B=JQB=J_Q, and let E(μ,ν)E(\mu,\nu) and Xs(k1,k2)X_s(k_1,k_2) be the coordinate expressions defined in the source. All-table loci equations conjecture. For k,Nk,\ell\in\mathbb N with 1kr11\le k\le r-1 and 1ur11\le\ell\le u-r-1, the ideal I(Z(Pk,))\mathcal I(\mathfrak Z(P_{k,\ell})) is given as follows: if (k,)At(k,\ell)\in A_t, it is generated by E(kt1,t+1)E(k-t-1,t+\ell-1) when k+rk+\ell\le r, and by E(k1,k2),X1(k1,k2),,Xs(k1,k2)E(k_1,k_2),X_1(k_1,k_2),\ldots,X_s(k_1,k_2) when k+>rk+\ell>r, with k1=kt1k_1=k-t-1, k2=t+(rk)1k_2=t+(r-k)-1, and s=k+rs=k+\ell-r; if (k,)BtCt(k,\ell)\in B_t\cup C_t, it is generated by E(k+t2,t)E(k+\ell-t-2,t) when k+rk+\ell\le r, and by E(k1,k2),X1(k1,k2),,Xs(k1,k2)E(k_1,k_2),X_1(k_1,k_2),\ldots,X_s(k_1,k_2) when k+>rk+\ell>r, with k1=rt2k_1=r-t-2, k2=tk_2=t, and s=k+rs=k+\ell-r. The source provides no resolution.

Sources & referencesView supporting material

Primary source

Anthony Iarrobino, Leila Khatami, Bart Van Steirteghem and Rui Zhao, “Nilpotent matrices having a given Jordan type as maximum commuting nilpotent orbit”, arXiv:1409.2192 (2018).

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