2 papers
math.OC2022
On a manifold formulation of self-concordant functions
Hiroshi Hirai
In this paper, we address an extension of the theory of self-concordant functions for a manifold. We formulate the self-concordance of a geodesically convex function by a condition…
math.CO2019
Reconstructing phylogenetic trees from multipartite quartet systems
Hiroshi Hirai, Yuni Iwamasa
A phylogenetic tree is a graphical representation of an evolutionary history of taxa in which the leaves correspond to the taxa and the non-leaves correspond to speciations. One of…