The characterization of $(n-1)$-spheres with $n+4$ vertices having maximal Buchstaber number

Abstract

We present a computationally efficient algorithm that is suitable for graphic processing unit implementation. This algorithm enables the identification of all weak pseudo-manifolds that meet specific facet conditions, drawn from a given input set. We employ this approach to enumerate toric colorable seeds. Consequently, we achieve a comprehensive characterization of $(n-1)$-dimensional PL spheres with $n+4$ vertices that possess a maximal Buchstaber number. A primary focus of this research is the fundamental categorization of non-singular complete toric varieties of Picard number $4$. This classification serves as a valuable tool for addressing questions related to toric manifolds of Picard number $4$. Notably, we have determined which of these manifolds satisfy equality within an inequality regarding the number of minimal components in their rational curve space. This addresses a question posed by Chen, Fu, and Hwang in 2014 for this specific case.

20 pages, 2 tables, 1 figure, 2 algorithms

References in corpus (2)

• Surface realization with the intersection edge functional
• An algorithmic strategy for finding characteristic maps over wedged simplicial complexes

Cited by in corpus (1)

• Stellar subdivisions, wedges and Buchstaber numbers