Re: Complex numbers in Mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg61691] Re: [mg61647] Complex numbers in Mathematica*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Wed, 26 Oct 2005 01:01:46 -0400 (EDT)*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*References*: <200510250107.VAA16788@smc.vnet.net>*Reply-to*: murray at math.umass.edu*Sender*: owner-wri-mathgroup at wolfram.com

In the regular Mathematica, version 5.2 (NOT the Teacher's Edition), I get: Factor[(5 - 3I) + (-4 + I)x + (1 - I)x^2] ((1 + I) - I*x)*((1 - 4*I) + (1 + I)*x) (output shown in InputFormat above). Per Rønne wrote: > If I write: > > In[8]=Factor[(5 - 3I) + (-4 + I)x + (1 - I)x^2] > > I get > Nonreal::"warning": "Nonreal number encountered." > Out[8]= Nonreal > > The same with Sqrt[-1]. > > Why doesn't it show the complex numbers? According to the books it > should - is it a matter of preferences set? > > I'm using Mathematica Teacher's Edition 1.1 on MacOS X. -- 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

**References**:**Complex numbers in Mathematica***From:*per@RQNNE.invalid (Per Rønne)