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D.15.7.6 LRschubmult

Procedure from library lrcalc.lib (see lrcalc_lib).

Usage:
LRschubmult(x, y); x, y lists of integers

Return:
list of lists

Purpose:
computes the expantion of a product
of two Schubert polynomials in the basis of Schubert polynomials

Note:

Example:
 
LIB "lrcalc.lib";
// Compute the expantion of a square of the Schubert polynomial
// corresponding to  (1 3 2) in the basis of Schubert polynomials
list x = 1, 3, 2;
LRschubmult(x, x);
==> [1]:
==>    [1]:
==>       1
==>    [2]:
==>       [1]:
==>          1
==>       [2]:
==>          4
==>       [3]:
==>          2
==>       [4]:
==>          3
==> [2]:
==>    [1]:
==>       1
==>    [2]:
==>       [1]:
==>          2
==>       [2]:
==>          3
==>       [3]:
==>          1