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13 papers · 1 filter
Buchsbaum Stanley--Reisner rings with minimal multiplicity
Naoki Terai, Ken-ichi Yoshida
In this paper, we study non-Cohen--Macaulay Buchsbaum Stanley--Reisner rings with linear free resolution. In particular, for given integers , , with , $2 \le q \…
Equivariant completions of toric contraction morphisms
Osamu Fujino
We treat equivariant completions of toric contraction morphisms as an application of the toric Mori theory. For this purpose, we generalize the toric Mori theory for non-$\mathbb Q…
Charge-Density-Wave Formation in the Doped Two-Leg Extended Hubbard Ladder
M. Tsuchiizu, Y. Suzumura
We investigate electronic properties of the doped two-leg Hubbard ladder with both the onsite and the nearest-neighbor Coulomb repulsions, by using the the weak-coupling renormaliz…
ARPES on NaCoO: Fermi surface, extended flat dispersion, and unusual band splitting
H. -B. Yang, S. -C. Wang, A. K. P. Sekharan +11
The electronic structure of single crystals NaCoO, which are closely related to the superconducting NaCoO.HO (), is studied by angle-res…
Ground-state phase diagram of the one-dimensional half-filled extended Hubbard model
M. Tsuchiizu, A. Furusaki
We revisit the ground-state phase diagram of the one-dimensional half-filled extended Hubbard model with on-site (U) and nearest-neighbor (V) repulsive interactions. In the first h…
Hilbert-Kunz multiplicity of three-dimensional local rings
Kei-ichi Watanabe, Ken-ichi Yoshida
In this paper, we investigate a lower bound (say ) on Hilbert-Kunz multiplicities for non-regular unmixed local rings of Krull dimension with characteristic .…