>>>>> "Dylan" == Dylan Thurston <dpt@math.harvard.edu> writes:
Dylan> On Mon, Apr 15, 2002 at 10:04:39AM +0200, Juan Pablo Hierro ?lvarez wrote:
>> Recently, there has been a bug announced in this list. Basically, maxima
>> failed to integrate properly expresions of the type:
>> integrate(3^log(x), x);
>> It produced an erroneous result, which is worst than not producing result at
>> all. The reason is just it tries to use the sin algorithm to evaluate the
>> integral instead of the risch algorithm, which is more general but produces
>> results which are harder to simplify.
>>
>> One quick hack to test this could be to type
>> :lisp(push '%risch nounl)
>> before evaluating such integral ...
Dylan> Surely the correct fix is to make sure that the sin algorithm does not
Dylan> return incorrect results, and then if that algorithm fails try the risch
Dylan> algorithm?
I agree. Doesn't Wolfgang Jenkner's patch correct the problem? I
haven't tried it out yet.
Ray