Affiliation:
1. Faculty of Education, Mathematics, Kagawa University, Saiwaicho 1-1, Takamatsu 760-8522, Japan
Abstract
In this paper, we prove that if a Gorenstein toric Fano variety (X,−KX) is asymptotically Chow semistable, then it is Ding polystable with respect to toric test configurations (Theorem 3). This extends the known result obtained by others (Theorem 2) to the case where X admits Gorenstein singularity. We also show the additivity of the Mabuchi constant for the product toric Fano varieties in Proposition 2 based on the author’s recent work (Ono, Sano and Yotsutani in arxiv:2305.05924). Applying this formula to certain toric Fano varieties, we construct infinitely many examples that clarify the difference between relative K-stability and relative Ding stability in a systematic way (Proposition 1). Finally, we verify the relative Chow stability for Gorenstein toric del Pezzo surfaces using the combinatorial criterion developed in (Yotsutani and Zhou in Tohoku Math. J.71 (2019), 495–524.) and specifying the symmetry of the associated polytopes as well.
Funder
JSPS KAKENHI
Kagawa University Research Promotion Program 2021
Subject
General Mathematics,Engineering (miscellaneous),Computer Science (miscellaneous)
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