HomeAbout
© 2025 DaoMath. All rights reserved.
Sign in
Back to Home

Hilbert function of canonical modules of 111-dimensional singularities

HDHailong Dao
•Posted on Jun 19, 2026
Difficulty
3 / 5
Problem Status
Open
Keywords
No keywords added yet.
22 views
0 upvotes
0 downvotes

Let (R,m,k)(R,m,k)(R,m,k) be a complete, reduced, local ring of dimension 111. Let ω=ωR\omega=\omega_Rω=ωR​ be the canonical module of RRR. Let Hn(ω)=ℓ(mnω/mn+1ω)H_n(\omega) =\ell(m^n\omega/m^{n+1}\omega)Hn​(ω)=ℓ(mnω/mn+1ω). It is known that:

  1. RRR has minimal multiplicity (e(R)=μ(m)e(R) =\mu(m)e(R)=μ(m)) iff H0=e−1H_0=e-1H0​=e−1 and Hi=e,i≥1H_i=e, i\geq 1Hi​=e,i≥1.
  1. RRR has almost minimal multiplicity (e(R)=μ(m)+1e(R) =\mu(m)+1e(R)=μ(m)+1) then H2=eH_2=eH2​=e.

Can we prove similar statements? For instance, can we bound the first index nnn such that Hn(ω)=eH_n(\omega)=eHn​(ω)=e by e−μ(m)+1e-\mu(m)+1e−μ(m)+1?

Comments (0)

No comments yet

Be the first to start the discussion!