factor(sqrt(x^2-1)) => doesn't factor
should be sqrt(x-1)*sqrt(x+1)
factor((t^2+2*t+1)^(1/3)) => doesn't factor
should be (t+1)^(2/3)
and perhaps the most surprising:
factor(sqrt(t^2+2*t+1)) => doesn't factor
should be (t+1) or abs(t+1)
Workaround is to use scanmap(factor,expr).
I am not suggesting that factor should factor all
subexpressions (like scanmap). In these cases, it is a
top-level factorization that is being missed.
Robert Dodier
2006-07-19
Robert Dodier
2006-07-19
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user_id=501686
Observed in 5.9.3cvs.