[ library(linearize) | Reference Manual | Alphabetic Index ]

linrenorm(+LinOld, -LinNew)

Renormalize a linear form
LinOld
Possibly denormal lists of monomials
LinNew
Normalized lists of monomials

Description

The normal form of linear expressions is 
		[C0*1, C1*X1, C2*X2, ...]
where Ci are numbers and Xi are distinct variables. The first (constant) term is always present, Ci (i>=1) are nonzero.

Such a form can become denormalized due to unifications (instantiation or variable-variable aliasing). This predicate renormalizes it. Note that variables may only become instantiated to numbers!

Examples

    ?- linearize(3*X-7*Y+2*(X+Y), L1, R), writeln(L1),
	Y = 3,
	linrenorm(L1,L2), writeln(L2).

    [0 * 1, 5 * X, -5 * Y]
    [-15 * 1, 5 * X]

See Also

linearize / 3, delinearize / 2