Real domain for symbolic variables

[golam-m-hossain]

In new symbolics, the default symbolic variables are complex.
However, sometime it is useful/desirable to make the domain of
variables to be real.

Currently, there are no way to specify the domain of variables
in Sage although underlying Ginac allows it. For example: following
would to be good to have.

sage: var('x,y,z', domain='real')

Instructions for installing these patches (sage-4.1.1)

(1) Pynac patch
(a) Get the pynac spkg

http://sage.math.washington.edu/home/burcin/pynac/pynac-0.1.8.p2.spkg

(b) Apply the pynac patch for enhanced symbols

http://www.math.unb.ca/~ghossain/texname-and-domain-of-symbols-pynac.patch

(c) install the patched spkg in Sage.

OR if you are feeling lazy, you can directly install my patched copy of pynac from here

http://www.math.unb.ca/~ghossain/pynac-0.1.8.p2-symbols.spkg

(2) Sage patch:

Apply the attached sage patch after modified pynac spkg is installed

Notes:

#6403 will also be resolved by this patch

#6340 patch conflicts with this patch. This patch here should supersede the patch at #6340.

Component: symbolics

Keywords: pynac

Author: Golam Mortuza Hossain, Burcin Erocal

Reviewer: Karl-Dieter Crisman, Ross Kyprianou, Minh Van Nguyen

Merged: sage-4.3.3.alpha1

Issue created by migration from https://trac.sagemath.org/ticket/6559

[sagetrac-mvngu]

comment:1

#6802 is a duplicate of this ticket.

[golam-m-hossain]

Attachment: trac_6559-domain-and-latex_name-for-variable.patch.gz

[golam-m-hossain]

Description changed:

--- 
+++ 
@@ -10,3 +10,35 @@
 ```
 sage: var('x,y,z', domain='real')
 ```
+
+
+
+
+Instructions for installing these patches (sage-4.1.1)
+
+**(1) Pynac patch**   
+ (a) Get the pynac spkg
+
+ http://sage.math.washington.edu/home/burcin/pynac/pynac-0.1.8.p2.spkg
+
+ (b) Apply the pynac patch for enhanced symbols
+
+ http://www.math.unb.ca/~ghossain/texname-and-domain-of-symbols-pynac.patch
+
+ (c) install the patched spkg in Sage.
+
+ **OR** if you are feeling lazy, you can directly install my patched copy of pynac from here
+
+ http://www.math.unb.ca/~ghossain/pynac-0.1.8.p2-symbols.spkg
+
+
+**(2) Sage patch:**
+
+Apply the attached sage patch after modified pynac spkg is installed
+
+**Notes:**
+
+#6403 will also be resolved by this patch
+
+#6340 patch conflicts with this patch. This patch here should supersede the patch at #6340.
+

[golam-m-hossain]

Author: Golam Mortuza Hossain

[maxthemouse]

comment:3

How does this relate to pynac 0.1.9 which is in Sage 4.2.1? ~ Adam

[sagetrac-rossk]

comment:4

Applied patch and the following errors were returned:

applying trac_6559-domain-and-latex_name-for-variable.patch
patching file sage/calculus/var.pyx
Hunk #1 FAILED at 0
Hunk #2 FAILED at 8
Hunk #4 FAILED at 81
3 out of 4 hunks FAILED -- saving rejects to file sage/calculus/var.pyx.rej
patching file sage/symbolic/pynac.pyx
Hunk #1 FAILED at 454
Hunk #2 FAILED at 504
2 out of 2 hunks FAILED -- saving rejects to file sage/symbolic/pynac.pyx.rej
patching file sage/symbolic/ring.pyx
Hunk #6 succeeded at 769 with fuzz 1 (offset -2 lines).
patch failed, unable to continue (try -v)
patch failed, rejects left in working dir
errors during apply, please fix and refresh trac_6559-domain-and-latex_name-for-variable.patch