Inkscape

Search first

Has anyone already drawn what you are intending to draw? If you’re working in the open source world, with well-defined concepts, then you may already be able to find the visualization you’re looking for online. Do an image search. How many people have wasted time reproducing something similar to the following drawing?

It looks like Google’s image search is way better than DuckDuckGo’s image search:

• list of matrices normal diagonalizable unitary symmetric site:en.wikipedia.org at DuckDuckGo

• list of matrices normal diagonalizable unitary symmetric site:en.wikipedia.org - Google Search

Use the !gi bang for google image search.

Import PDFs

The strange characters you get when importing mathematical symbols are explained in (3) Cannot properly import PDF files containing math notations : Inkscape. Should this be filed as a defect? It seems to have been unofficially filed in Is there a way to import a PDF into Inkscape with characters from the unicode supplementary planes? - SO.

Export .tex

For more on math in Inkscape, see How I draw figures for my mathematical lecture notes using Inkscape | Gilles Castel.