Hi Folks!

I think there is a bug in the method to_chain in skew_tableau.py

sage: t = [[None, 2, 3], [3]]
sage: t = SkewTableau(list(t))
sage: t.to_chain()
[[1], [2], [3, 1]]

sage: t = [[None, 1, 2], [2]]
sage: t = SkewTableau(list(t))
sage: t.to_chain()
[[1], [2], [3, 1]]

Really in the first case we should get

sage: t.to_chain()
[[1], [1], [2], [3, 1]]

Do you agree? The fix should be easy!

Best,

Anne

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