2 papers
math.GT2026
Two-numbers and Euler characteristics for quandles
Ryoya Kai, Akira Kubo, Hiroshi Tamaru
Quandles can be regarded as generalizations of symmetric spaces. In the theory of symmetric spaces developed by Chen and Nagano, there is an interesting relationship between the tw…
math.GT2024
On the Euler characteristics for quandles
Ryoya Kai, Hiroshi Tamaru
A quandle is an algebraic system whose axioms generalize the algebraic structure of the point symmetries of symmetric spaces. In this paper, we give a definition of Euler character…