Use mutable boolean adj matrix in IsHamiltonianDigraph

digraphs · Apr 10, 2019 · 60202e7 · 60202e7
1 parent 12efe9a
commit 60202e7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/gap/prop.gi b/gap/prop.gi
@@ -574,7 +574,7 @@ function(gr)
  indegs := InDegrees(gr);
  outdegs := OutDegrees(gr);
  fulldegs := indegs + outdegs;
- adjmatrix := BooleanAdjacencyMatrix(gr);
+ adjmatrix := BooleanAdjacencyMatrixMutableCopy(gr);
  # checks if Meyniel's theorem, Theorem 4.1 or Theorem 4.2 are applicable.
  checkMT := true;
  check41 := true;