TYP::IsSkewDiag --
tests whether the argument is a skew diagram
Call(s)
TYP::IsSkewDiag(expr)
Parametersexpr | - | any expression |
Introduction
The TYP::IsSkewDiag function tests whether expr is a skew diagram that is a
a list with two components l1 and l2, l1 being the exterior
shape, l2 the interior shape.
The corresponding diagram of boxes must be connected, that is
l1[i] >= l2[i-1].
Skew diagrams are special cases of skew partitions.
Example 1>> muEC::TYP::IsSkewDiag( [[3,1,1], [2,1]] );
FALSE
>> muEC::TYP::IsSkewPart( [[3,1,1], [2,1]] );
TRUE
>> muEC::TYP::IsSkewDiag( [[3,2], [1,1]] );
TRUE
Related FunctionsMuPAD Combinat, an open source algebraic combinatorics package