Ask Your Question

Has ticket #6480 been fixed?

asked 2015-06-27 19:47:35 -0500

Alasdair gravatar image

updated 2015-06-27 19:55:28 -0500

The ticket is:

.subs_expr() method doesn't work for argument of D derivative operator

Here is an example (from Sage 6.2, which I'm currently using):

y = function('y',x)
f = function('f',x,y)
d1 = diff(f,x,1)

F*D[1](f)(x, y(x)) + D[0](f)(x, y(x))

So far, all good. But when I try:


I receive the error:

TypeError: argument symb must be a symbol

Maybe my syntax is wrong, so either my question is moot, in which case what am I doing wrong? Or maybe my syntax is correct and the fault is still a ticket for subs_expr. Advice as always would be very welcome!

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted

answered 2015-06-27 20:30:52 -0500

tmonteil gravatar image

As you can check the ticket is still open.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower


Asked: 2015-06-27 19:47:35 -0500

Seen: 59 times

Last updated: Jun 27 '15