Another failing doctest from Judson's abstract algebra text. How does one now make elements of the lattice of integer decompositions?
sage: CP = Posets.IntegerCompositions(5) sage: C = LatticePoset(CP) sage: elts = list(C); elts [[5], [1, 4], [4, 1], [1, 3, 1], [3, 2], [1, 2, 2], [3, 1, 1], [1, 2, 1, 1], [2, 3], [2, 1, 2], [2, 2, 1], [2, 1, 1, 1], [1, 1, 3], [1, 1, 1, 2], [1, 1, 2, 1], [1, 1, 1, 1, 1]] sage: C([1,4]) ... TypeError: unhashable type: 'list' sage: C((1,4)) ... ValueError: <type 'tuple'> is not an element of this poset This worked in 4.8: sage: C.meet([1,1,1,2], [2,1,1,1]) [2, 1, 2] And still works if you grab the elements from the list: sage: a = elts[13]; b = elts[11] sage: C.meet(a, b) [2, 1, 2] Thanks, Rob -- -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
