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math.CO2018
Two-valenced association schemes and the Desargues theorem
Mitsugu Hirasaka, Kijung Kim, Ilia Ponomarenko
The main goal of the paper is to establish a sufficient condition for a two-valenced association scheme to be schurian and separable. To this end, an analog of the Desargues theore…
math.CO2018
Schurity and separability of quasiregular coherent configurations
Mitsugu Hirasaka, Kijung Kim, Ilia Ponomarenko
A permutation group is said to be quasiregular if every its transitive constituent is regular, and a quasiregular coherent configuration can be thought as a combinatorial analog of…