Ademir Hujdurović, Đorđe Mitrović, Dave Witte Morris
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引用次数: 5
Abstract
A graph X is said to be unstable if the direct product X×K 2 (also called the canonical double cover of X) has automorphisms that do not come from automorphisms of its factors X and K 2 . It is nontrivially unstable if it is unstable, connected, and non-bipartite, and no two distinct vertices of X have exactly the same neighbors.
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