#4498: Implement a symbolic version of the arg function; the current one is only
for actual numbers
------------------------------+---------------------------------------------
Reporter: TimothyClemans | Owner: somebody
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: basic arithmetic | Resolution:
Keywords: |
------------------------------+---------------------------------------------
Changes (by was):
* summary: The argument function does not work with variables. =>
Implement a symbolic version of the arg
function; the current one is only for actual
numbers
* type: defect => enhancement
* milestone: sage-3.2.1 => sage-wishlist
Old description:
> "The function should return the argument of a complex function." - Ronan
> Paixão
New description:
It would be nice if there were a symbolic arg function, just like the
symbolic sin, cos, etc., functions. Then the following would happen:
{{{
sage: f = arg(x); f
arg(x)
sage: f.subs(x=1+I)
arg(1+I)
}}}
Now we have
{{{
sage: arg(1+I)
0.785398163397
sage: type(arg(1+I))
<type 'sage.rings.real_double.RealDoubleElement'>
}}}
I.e., the arg in Sage is currently the numerical person's arg, not the
symbolic person's. It just casts to CDF.
"The function should return the argument of a complex function." - Ronan
Paixão
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4498#comment:3>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en
-~----------~----~----~----~------~----~------~--~---
