Modulus / Absolute Value

*To*: mathgroup at smc.vnet.net*Subject*: [mg90058] Modulus / Absolute Value*From*: Felipe Mannshardt <vexie.infamous at googlemail.com>*Date*: Fri, 27 Jun 2008 06:19:07 -0400 (EDT)

Greetings, i have been searching the way to tell Mathematica to use Modulus / Absolute Value. I have been unable to find. LATEX \left(\int_0^{\frac{\pi }{2}} f[x] \, dx+\int_{\frac{\pi }{2}}^{\pi } f[x] \, dx\right)+\int_0^{\pi } g[x] \, dx /LATEX > I should be subtracting the upper Integral from the lower Integral, but since i could not find a way to tell Mathematica to use Modulus /Absolute Value. I had to add the upper to the lower . . . my functions are, f and g LATEX f[\text{x$\_$}]\text{:=}\text{Sin}[2*x]g[\text{x$\_$}]\text{:=}x^2-(\pi *x) /LATEX > So, can some1 help me out with this one? How to use Modulus/Absolute Value (German, Betrag) with Mathematica.

**Follow-Ups**:**Re: Modulus / Absolute Value***From:*Murray Eisenberg <murray@math.umass.edu>