Given virtual characters ch1 and ch2, the method computes the character of the tensor product of corresponding virtual representations of the symmetric group.
i1 : ch1 = new ClassFunction from {{4,4} => 2, {8} => -1, {5,2,1} => 2, {3,2,2,1} => 1};
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i2 : ch2 = new ClassFunction from {{2,2,2,2} => -4, {5,2,1} => 1, {3,2,2,1} => 3};
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i3 : internalProduct(ch1,ch2)
o3 = ClassFunction{{3, 2, 2, 1} => 3}
{5, 2, 1} => 2
o3 : ClassFunction
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i4 : ch1 * ch2
o4 = ClassFunction{{3, 2, 2, 1} => 3}
{5, 2, 1} => 2
o4 : ClassFunction
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