Re: Can Mathematica do this?
- To: mathgroup at smc.vnet.net
- Subject: [mg79438] Re: Can Mathematica do this?
- From: dimitris <dimmechan at yahoo.com>
- Date: Fri, 27 Jul 2007 05:40:42 -0400 (EDT)
- References: <f86r72$pe8$1@smc.vnet.net>
On 25 , 09:39, "Peter Hensen" <peter_hen... at cox.net> wrote:
> Can Mathematica do this?
> You plug in a complex-valued function, it gives you all the poles of the
> function on the complex plane automatically...
On second run, (and since you also posted the same question
in a forum regarding another CAS), you may find interesting the
function singular of this CAS (this command is based to the
solve command; someone can implement-surely not an easy task!-a
similar function to Mathematica)
Type to a worksheet of the of the other CAS
#code from the other CAS#
?singular;
See the help browser of the other CAS for more details.
Regards
Dimitris
PS1)
Thanks professor R. Israel for point me out this useful
function.
PS2)
Some examples follows now
> singular(x*y + 1/(x*y), x);
{x = 0}, {x = infinity}, {x = -infinity}
> singular(ln(x)/(x^2-1));
{x = 0}, {x = 1}, {x = -1}
> singular(x/(x-y));
{x = y, y = y}
> singular(tan(x));
{x = _Z1~ Pi + 1/2 Pi}
> singular(tan(x), 1..10);
Pi 3 Pi 5 Pi
{x = ----}, {x = ----}, {x = ----}
2 2 2
> singular(Psi(1/x));
1
{x = 0}, {x = infinity}, {x = -infinity}, {x = - --------}
_N1~ - 1