Files
Upsilon/poincare/test
Gabriel Ozouf 3f6e4444a5 [poincare/derivative] Reduce before replacing symbol
The general formula for deriving a power makes use of the logarithm,
which often disappears at simplification. However, replacing the symbol
before simplifying can lead to applying an invalid argument to the
logarithm, making the whole expression invalid.

e.g. diff(1/x,x,-2)
     If x is replaced by -2 before reducing the power derivative, ln(-2)
will reduce to Unreal, as will the rest of the expression.
2020-12-07 14:06:24 +01:00
..
2020-11-04 15:11:45 +01:00
2020-11-26 17:51:40 +01:00