The Lech-type Dutta-multiplicity conjecture for complete local rings

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Let RR be a complete local ring, and let FF be a short complex in the perfect-complex category, meaning a short complex in perf⁡R\operatorname{perf} R supported on the maximal ideal. Let e(R)e(R) denote the Hilbert–Samuel multiplicity of RR, and let χ∞(F)\chi_\infty(F) denote the Dutta multiplicity. Lech-type Dutta-multiplicity conjecture. If FF is a short complex in perf⁡R\operatorname{perf} R, then

χ∞(F)≥e(R).\chi_\infty(F)\geq e(R).

This is proposed as an extension of the preceding positive-characteristic results and is presented in the context of a reformulation of Lech's conjecture. Its status is not resolved in the supplied text.

References

Primary source

Srikanth B. Iyengar, Linquan Ma and Mark E. Walker, “Multiplicities and Betti numbers in local algebra via lim Ulrich points”, arXiv:2104.10140 (2021).

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