# All Questions

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### Issue with PieChart3D in Version10. Is it Mac specific?

I was testing version 10 to see if the ImagePadding bug described here had been fixed and came across a significant issue. The chart (code from linked question) ...
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### How do you plot level curves describing a 3d surface on the x-y plane?

I am trying to plot several level curves of the cone: [x=ucos[v], y=usin[v], z=u],[0<=u<=2,0<=v<=2Pi] in the x-y plane. Does anyone know how to do this? Thanks
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### Operations on online files via public URL access

I need Mathematica to access an online public directory via some URL (fake in this case) http://example.com/images and perform operations similar to those Mathematica can do on OS directories and ...
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### How to simplify expression and use HoldForm at the same time?

Hopefully a simple problem for the experts here. I have a need many times to build a symbolic expression for an equation (say a PDE) to use for plot labels in a low level function inside ...
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### Implementing local complements of graphs

I'm trying to write a routine which generates the local complement of a graph at a vertex. For those who don't know, the local complement for a singly-connected, undirected graph is defined as the ...