John Fredsted

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17 years, 169 days

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These are Posts that have been published by John Fredsted

Is there anybody, MapleSoft staff included, of course, that could give some help or advice on the issues raised in thread1 (which died unresolved) and thread2 (which I somewhat expect to share destiny with thread1)?
Note added: As correctly pointed out by Joe Riel in his post below, my function fromTree fails doing what it is supposed to do for expressions which contain lists and/or sets. For a version of fromTree which behaves properly (I believe) also for expressions containing lists and/or sets, see my post below. Consider the following two functions:
toTree   := x -> `if`(op(x) = x,x,[op(0,x),map(toTree,[op(x)])[]]):
Can evalc be persuaded to return for
assume(x::complex):
+1/2*evalc(x + conjugate(x));
-I/2*evalc(x - conjugate(x));
the real and imaginary parts of x, respectively, i.e., Re(x) and Im(x). Further, can evalc be persuaded to let
assume(u::complex,v::complex):
evalc(Re(u)+Re(v)-Re(u+v));
evalc(Im(u)+Im(v)-Im(u+v));
return zeros identically? It does return zeros identically if either u or v (or both) is real-valued. But not if u and v are both assumed complex-valued. Why not?
Is it possible to have installed both Maple 9.5 and Maple 11 without interference? The reason I ask instead of just trying it out myself is that when I tried to uninstall Maple 11 some days ago (in connection with my roll-back to Maple 9.5) it got stuck. So instead of risking that again, probably with some unfortunate consequences for the integrity of the registration database, I thought I might just ask your guys first. Some of you might wonder why I want to have both installed. But I thought that I might continue using Maple 9.5 for my usual research, and then using Maple 11, possibly in conjunction with a text editor, for things which cannot be done using Maple 9.5.
As a direct result of the tab indentation nuisance reported in the three threads today I have rolled back my system from Maple 11 to Maple 9.5: I have spend quite some time today manually going through all the Maple documents which have been contaminated by loads and loads of XML codes which Maple 11 produces.
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