Integral congruence conjecture for skew-symmetric matrices

From papers

Let AA and HH be skew-symmetric matrices with integer entries. Assume that HH is nondegenerate, \fam0rkA\fam0rkH\mathop{\fam0 rk} A\leq\mathop{\fam0 rk} H, and every \fam0rkH×\fam0rkH\mathop{\fam0 rk} H\times\mathop{\fam0 rk} H minor of AA is divisible by detH\det H.

Integral congruence conjecture. There is an integer matrix YY such that

A=YTHY.A=Y^T H Y.

The divisibility condition is automatic when \fam0rkA<\fam0rkH\mathop{\fam0 rk} A<\mathop{\fam0 rk} H. The source presents this matrix assertion as the ingredient needed for the corresponding characterization of Z\mathbb Z-embeddings of kk-complexes; its resolution status is not specified here.

Progress summary

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Sources & referencesView supporting material

Primary source

A. Skopenkov, “Embeddings of k-complexes in 2k-manifolds and minimum rank of partial symmetric matrices”, arXiv:2112.06636 (2026).

Solutions 0

No solutions have been posted yet.