def last(self):
"""
Return the last standard ribbon of ``self``.
EXAMPLES::
sage: StandardRibbonShapedTableaux([2,2]).last()
[[None, 1, 2], [3, 4]]
"""
return self.from_permutation(descents_composition_last(self.shape))
def last(self):
"""
Returns the first standard ribbon of ribbon shape shape.
EXAMPLES::
sage: StandardRibbons([2,2]).last()
[[1, 2], [3, 4]]
"""
return from_permutation(permutation.descents_composition_last(self.shape))
def last(self):
"""
Return the last standard ribbon of ``self``.
EXAMPLES::
sage: StandardRibbonShapedTableaux([2,2]).last()
[[None, 1, 2], [3, 4]]
"""
return self.from_permutation(descents_composition_last(self.shape))
def last(self):
"""
Returns the first standard ribbon of ribbon shape shape.
EXAMPLES::
sage: StandardRibbons([2,2]).last()
[[1, 2], [3, 4]]
"""
return from_permutation(permutation.descents_composition_last(self.shape))