Transformation Rules via AlgebraicRules
- To: mathgroup at yoda.ncsa.uiuc.edu
- Subject: Transformation Rules via AlgebraicRules
- From: Jack <uunet!sun.udel.edu!jack>
- Date: Fri, 13 Apr 90 18:01:33 EDT
Can someone explain the following result. I thought I would get the same
result using rule1 and rule2 below.
rule1 = x->t^(3/2)
rule2 = AlgebraicRules[x==t^(3/2),{x,t}]
exp = x^(5/4) + x + x^2 + x^3 + x^4
(1) exp/.rule1
(2) exp/.rule2
(1) gives the desired result....
3 15 9
- -- -
2 8 3 2 6
Out[184]= t + t + t + t + t
while (2) gives
1
-
2 3 4 4 5
General::newv: x + x + x + x + `private`$AuxVar[x ]
involves variables not among {x, `private`$AuxVar[Sqrt[t]], t}.
3
-
2
Replace::rep: {t -> t, x -> t } encountered where lhs->rhs expected.
etc.,etc.