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Publikováno v:
Symmetry, Vol 12, Iss 5, p 751 (2020)
If G = ( V ( G ) , E ( G ) ) is a simple connected graph with the vertex set V ( G ) and the edge set E ( G ) , S is a subset of V ( G ) , and let B ( S ) be the set of neighbors of S in V ( G ) ∖ S . Then, the differential of S ∂ ( S ) is define
Externí odkaz:
https://doaj.org/article/a5e8e21f955c48e4a9a93e5616359160