Ratio of two symbolic expressions involving derivative does not simplify

[golam-m-hossain]

In new symbolics, ratio of two symbolic expressions involving derivative does not simplify

sage: f(x) = function('f', x)
sage: g = f(x).diff(x)
sage: h = f(x).diff(x)*sin(x)
sage: h/g
sin(x)*D[0](f)(x)/D[0](f)(x)

However, for some ordering it does simplify

sage: f(x) = function('f', x)
sage: g = f(x).diff(x)
sage: h = sin(x)*f(x).diff(x)
sage: h/g
sin(x)

Component: symbolics

Author: Burcin Erocal

Reviewer: Karl-Dieter Crisman

Merged: Sage 4.1.2.alpha4

Issue created by migration from https://trac.sagemath.org/ticket/6524

[burcin]

Attachment: trac_6524-fderivative_compare.patch.gz

[burcin]

Author: Burcin Erocal

[burcin]

comment:1

This is fixed in my pynac tree, attachment: trac_6524-fderivative_compare.patch contains doctests for Sage.

I will post a new pynac package and review instructions soon.

[burcin]

comment:2

New pynac package available at #6993.

[kcrisman]

Reviewer: Karl-Dieter Crisman

[kcrisman]

comment:3

Looks like it's fixed. Pending of course positive review of the Pynac package as a whole.

[sagetrac-mvngu]

Merged: Sage 4.1.2.alpha3

[sagetrac-mvngu]

Changed merged from Sage 4.1.2.alpha3 to Sage 4.1.2.alpha4

[sagetrac-mvngu]

comment:5

There is no 4.1.2.alpha3. Sage 4.1.2.alpha3 was William Stein's release for working on making the notebook a standalone package.