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math.CO2021
On the In-Out-Proper Orientations of Graphs
Ali Dehghan
An orientation of a graph is {\it in-out-proper} if any two adjacent vertices have different in-out-degrees, where the in-out-degree of each vertex is equal to the in-degree mi…
math.CO2021
On the maximum number of non attacking rooks on a high-dimensional simplicial chessboard
Arash Ahadi, Mohsen Mollahajiaghaei, Ali Dehghan
The simplicial rook graph is the graph whose vertices are vectors in such that for each vector the summation of its coordinates is and…