Eisenbud–Huneke–Ulrich conjecture on powers of ideals with linear syzygies

Let S=C[x0,x1,,xn]S=\mathbb{C}[x_0,x_1,\dots,x_n], let m\mathfrak{m} be the maximal ideal generated by the variables, and let II be a homogeneous ideal generated in degree dd. The resolution of II is linear for pp steps if its first linear strand is exact up to cohomological degree p+1-p+1, equivalently, for every 0ip0\leq i\leq p, one has

βi,j(I)=dimC(ToriS(I,C)i+j)0j=d.\beta_{i,j}(I)=\dim_{\mathbb{C}}\left(\operatorname{Tor}_i^S(I,\mathbb{C})_{i+j}\right)\neq 0\quad\Longleftrightarrow\quad j=d.

Eisenbud–Huneke–Ulrich conjecture. If II is m\mathfrak{m}-primary and the resolution of II is linear for pp steps, where p1p\geq 1, then

It=mtdfor all tnp.I^t=\mathfrak{m}^{td}\quad\text{for all }t\geq\frac{n}{p}.

The conjecture predicts that sufficiently many initial linear syzygy steps force every sufficiently high power of an m\mathfrak{m}-primary ideal to equal the corresponding power of the maximal ideal. The paper proves a slightly weaker version for a more general class of ideals.

Sources & referencesView supporting material

Primary source

Fuxiang Yang, “Higher syzygy bundles and the Eisenbud-Huneke-Ulrich conjecture”, arXiv:2606.14596 (2026).

Additional references

3 papers in this index state this conjecture (2018–2026). The statement above is taken from the most recent of them; the others are arXiv:2012.05681, arXiv:1803.01388.

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