Variable use between CAS and Home.

[Rudi]

I have written a user defined function. It change little x to great X.
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I have defined the Name of the function in the follow:
CHANGE x to X
CH x 2 X
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#cas
CHx2X(cmd):=
BEGIN
return subst(cmd,x = ('X'));
END;
#end

Examples (In Mode CAS):


1. CHx2X(2*x+5*x²-5) ==> 2*X+5*X²-5

2. F1:= CHx2X(2*x+5*x²-5) ==> X-> (2*X+5*X²-5)