       combining contourplot and regionplot

• To: mathgroup at smc.vnet.net
• Subject: [mg98427] combining contourplot and regionplot
• From: "Cristina Ballantine" <cballant at holycross.edu>
• Date: Thu, 9 Apr 2009 05:57:38 -0400 (EDT)

```Given a complex function (say the Gamma function), I would like to plot
all points (x,y),  -10<x<10, -10<y<10,  that map to the interval (1,
infinity). I need to plot all points with Arg[Gamma[x+I*y]]==0 and
Abs[Gamma[x+I*y]]>1. Solutions to the equation can be plotted with
ContourPlot. Solutions to the inequality can be plotted with RegionPlot.
But how do I plot points that satisfy BOTH the equation and the inequality?
A similar question has been asked on the Forum before but did not receive
an answer. I am hoping this time someone can help. Thank you.

Cristina

```

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