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