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-rw-r--r--src/act4e_solutions/relations.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/act4e_solutions/relations.py b/src/act4e_solutions/relations.py
index 048b500..26f90a7 100644
--- a/src/act4e_solutions/relations.py
+++ b/src/act4e_solutions/relations.py
@@ -30,6 +30,9 @@ class SolFiniteRelationOperations(I.FiniteRelationOperations):
def transpose(self, fr: I.FiniteRelation[A, B]) -> I.FiniteRelation[B, A]:
raise NotImplementedError()
+ def as_relation(self, f: I.FiniteMap[A, B]) -> I.FiniteRelation[A, B]:
+ raise NotImplementedError()
+
class SolFiniteEndorelationProperties(I.FiniteEndorelationProperties):
def is_reflexive(self, fr: I.FiniteRelation[Any, Any]) -> bool: