[Date Index] [Thread Index] [Author Index]

Re: Inverse function

• To: mathgroup at smc.vnet.net
• Subject: [mg115579] Re: Inverse function
• From: Murray Eisenberg <murray at math.umass.edu>
• Date: Sat, 15 Jan 2011 04:45:40 -0500 (EST)

The function f[x_] := x^2 is not one-to-one, even on just the real 
numbers; and on the complex numbers it is exactly two-to-one (except at 
x = 0).  So it has no inverse function (as a real-valued function of a 
real variable).

So what are you really trying to ask?

On 1/14/2011 6:16 AM, Arnold wrote:
> Function y=x^2 is given. Give, please, a code in WM-7 with which help it is possible to receive function, return the given. That is, x=g (y).
> Thanks.
>

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305