Dear Martin and Waldek,
After theses mails about isExpt and is? I look in my *.spad draft files
around expand, combine and rewrite.
[Almost] every time I use this syntax :
...
is? (op, "sin"::Symbol) or is? (op, "cos"::Symbol) =>
...
I never use isExpt.
I play with is?(op, "%power") for a^b,
and I use a degree ("theMonom", a) if I want to get the 2 in a^2.
It isn't a fine command because it rebuild a polynom after extracting
the first term in the list.
The test "isAproduct?" can be done with "reductum numer expr = 0".
I feel I describe all the test I did around expand, rewrite and combine.
I hope I don't worry anyone.
Francois.
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