Curious behaviour of subs/eval

Question:Curious behaviour of subs/eval

Posted: Alasdair 98 Product: Maple

October 25 2006

A colleague asked me about this, and I couldn't help him:


> g:=y+exp(2*t):
> y2:=subs([y=3,t=0.1],g);
                       y2 := 4.221402758
> subs([y=y2,t=0.1],g);
                          4.221402758

Why has not the new value of y2 been substituted for y in this last expression? And the same thing happens for eval. Thanks, Alasdair

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