Any way to exclude branch-cut fills in this plot?

*To*: mathgroup at smc.vnet.net*Subject*: [mg80409] Any way to exclude branch-cut fills in this plot?*From*: chuck009 <dmilioto at comcast.com>*Date*: Tue, 21 Aug 2007 05:10:26 -0400 (EDT)

Here's a principle sheet plot of the Mathieu complex exponent: p4 = ParametricPlot3D[ {Re[z], Im[z], Evaluate[Im[MathieuCharacteristicA[3, z]]]} /. z -> r*Exp[I*t], {r, -10, 10}, {t, 0, 2*Pi}, PlotPoints -> {40, 40}, PlotRange -> All, Mesh -> All] Note the cliffs at the branch-cuts. Can anyone suggest a method to remove the fill to obtain a nice clean plot? Thanks! Charles

**Follow-Ups**:**Re: Any way to exclude branch-cut fills in this plot?***From:*Murray Eisenberg <murray@math.umass.edu>