Question:
are there any graph automorphism that imply total unimodularity of the graph's adjacency matrix,
resp. for which automorphisms exist graphs whose adjacency matrix is not totally unimodular
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$\begingroup$ Are your graphs oriented (or equivalently do your adjacency matrices have positive and negative entries)? $\endgroup$Sam Hopkins– Sam Hopkins ♦2025-08-15 15:15:15 +00:00Commented Aug 15 at 15:15
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1$\begingroup$ @SamHopkins the graphs are oriented $\endgroup$Manfred Weis– Manfred Weis2025-08-15 16:02:59 +00:00Commented Aug 15 at 16:02
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