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Sang-il Oum (엄상일), What is an isotropic system?
Tuesday, April 20, 2021 @ 4:30 PM - 5:30 PM KST
Bouchet introduced isotropic systems in 1983 unifying some combinatorial features of binary matroids and 4-regular graphs. The concept of isotropic system is a useful tool to study vertex-minors of graphs and yet it is not well known. I will give an introduction to isotropic systems.