define a real variable with var()

[sagetrac-mvngu]

At this sage-support thread, there is a request for var() to be able to define a "real" variable. Then one can do this

sage: a = var("a")
sage: conjugate(a)
a

As of Sage 4.1.1, we have this:

----------------------------------------------------------------------
| Sage Version 4.1.1, Release Date: 2009-08-14                       |
| Type notebook() for the GUI, and license() for information.        |
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sage: a = var("a")
sage: conjugate(a)
conjugate(a)

Component: symbolics

Keywords: var(), real variable

Issue created by migration from https://trac.sagemath.org/ticket/6802

[sagetrac-mvngu]

comment:1

Closing this as a duplicate of #6559.