I've done some research on how to design objects & 3D print them, but none of these CAD systems seems to be interested in producing mathematical objects. In fact, the whole process of generating these drawings seems exceedingly cumbersome & labor-intensive. It looks like I might have to generate my own objects using low-level file formats. It would appear that the 2 low level formats currently in use are the 'STL' file format, which is basically a long list of flat triangular facets given by triples of triples (X,Y,Z) points, which describe oriented triangles in 3-space. http://en.wikipedia.org/wiki/STL_(file_format) This file is sent to a 'slicer', which produces a 'path program' to direct the path of the printing nozzle for each 2D 'slice' of the 3D object. http://en.wikipedia.org/wiki/G-code If I'm trying to produce a 3D print of a mathematical structure, it might be easiest to simply generate my own G-code file, except for the fact that this G-code file probably contains a lot of 3D-printer-specific information. Has anyone on this list gone to these levels of detail? Also, I haven't been able to find any simple programs to do minimal structural analysis on these models -- e.g., to determine if they can even stand on their own.