Can someone please report it upstream? Or tell me how to do it? Am Montag, 21. Januar 2019 15:10:38 UTC+1 schrieb Dima Pasechnik: > > On Mon, Jan 21, 2019 at 2:07 PM Thrash <t.an...@gmx.net <javascript:>> > wrote: > > > > Thank you very much! > > > > "Not yet reported upstream" > > What does that mean? > > The bug is in Maxima, not in Sage itself. Sage components such as > Maxima are generally called "upstream". > > > > > Am Freitag, 18. Januar 2019 16:06:31 UTC+1 schrieb Emmanuel Charpentier: > >> > >> This is now Trac#27076. Not yet reported upstream (I have to finde a > way to recover access toi the damn sourceforge site...). > >> > >> As far as I can tell, this bug is distinct from all bugs reported > against desolve ; a cursoly look at othe "symbolics" tickets did not raise > this exact error, but I may have been mistaken : pleas feel free to correct > me... > >> > >> Thanks to Thrash for taking the time to formally report the bug. > >> > >> HTH, > >> > >> Le mercredi 16 janvier 2019 19:05:59 UTC+1, Thrash a écrit : > >>> > >>> As advised in the thread > >>> > >>> > https://ask.sagemath.org/question/45046/wrong-solutionoutput-for-differential-equation/ > > >>> > >>> I'm opening this one now. > >>> > >>> > >>> When running the following code, one obtains a wrong output: > >>> > >>> y=function('y')(x) > >>> desolve(diff(y)==4*y/x+x*sqrt(y),y,ics=[1,1]).factor() > >>> > >>> The output is > >>> 1/4*x^4*(log(x) - 2)^2 > >>> instead of > >>> 1/4*x^4*(log(x) + 2)^2 > >>> . Mathematica however outputs both (by running > >>> DSolve[{D[y[x], x] == 4*y[x]/x + x*Sqrt[y[x]], y[1] == 1}, y[x], x] > >>> ). > >>> > >>> > >>> Giac also gives the right answer: > >>> sage: giac("desolve([y'=4*y/x+x*sqrt(y),y(1)=1],y)").sage() > >>> [1/4*(ln(x) + 2)^2*e^(4*ln(x))] > >>> . > > > > -- > > You received this message because you are subscribed to the Google > Groups "sage-devel" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to sage-devel+...@googlegroups.com <javascript:>. > > To post to this group, send email to sage-...@googlegroups.com > <javascript:>. > > Visit this group at https://groups.google.com/group/sage-devel. > > For more options, visit https://groups.google.com/d/optout. >
-- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
