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 | 1 | initial version |
you just have to work over a base ring which is not QQ
sage: P.<x,y>=PolynomialRing(QQ['a'])
sage: a = P.base_ring().gen()
sage: f = x + y + a
sage: S=SymmetricFunctions(P.base_ring())
sage: S.from_polynomial(f)
a*m[] + m[1]
