id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
21873 (Maxima's) solve is unable to solve a linear system with complicated coefficients charpent "Long story : see [https://groups.google.com/forum/#!topic/sage-support/8TB431izNDc this] sage-support thread.
Short story : Let M_x be the matrix representing a rotation of angle theta about the x axis (in ```R^3```), and M_y the matrix representing a rotation of angle phi about the y axis. Trying to find by elementary methods the axis of the composition, i. e. solving M_y*M_x*V-V for V, the only solution found its the trivial null vector.
This has been reproduced in Maxima and reported on their bug system as [https://sourceforge.net/p/maxima/bugs/3239/ bugs:3239], with no answer at the time of the present filing.
This can be worked around by using Sympy's solve, which involves some conversions using _sage_() (not ''that'' well documented)." defect new major sage-7.5 symbolics maxima solve Reported upstream. No feedback yet.