Hello, I wonder if there is any way to use the join or meet operations in arbitrary posets? It seems that these methods are only exposed in the classes of join- resp. meet semilattices. However, it would be very convenient if these methods were available in general posets somehow, and would just raise an exception if the join/meet does not exist. The problem that I'm facing now is that the posets I'm working with are not join semilattices, but it is essential for me to compute joins of certain subsets anyway (these join do exist). Since the join semilattice constructor verifies that the poset is actually a join semilattice (and from what I see this validation cannot be disabled), I cannot construct my posets as join semilattices and use the join method. Any suggestions on how to go about it? Or is the only solution to just implement a join operation myself?
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