2 papers
math.GT2026
On the nonexistence of good involutions of symplectic quandles
Yasuhito Nakajima, Kentaro Yamaguchi
We investigate the necessary and sufficient condition for the existence of good involutions of symplectic quandles, which are defined on free -modules with an antisymmetric bili…
math.AG2024
A geometric interpretation of Krull dimensions of -algebras
JuAe Song, Yasuhito Nakajima
We investigate Krull dimensions of semirings and semifields dealt in tropical geometry. For a congruence on a tropical Laurent polynomial semiring $\boldsymbol{T}[X_1^{\pm}, \l…