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scheinerman/README.md

Welcome

Welcome to my GitHub site. I am a professor at Johns Hopkins University working in discrete mathematics. I'm the author of

and several others.

I am also an amateur coder and Julia enthusiast. I hope you find the packages provided here useful.

Postcardware

The packages in my GitHub are under the MIT License which is very permissive. While it is not necessary (legally) I do ask that if you find the code useful to send me a postcard. While I'd enjoy a real, physical postcard, an electronic substitute is perfectly fine. Send me a photo of your home town, your university, your dog, yourself, or whatever interesting image you'd like. My email address is ers@jhu.edu.

To send a physical postcard, please use this address:

Ed Scheinerman
Whiting School of Engineering Dean's Office
Johns Hopkins University
3500 San Martin Drive, First Floor
Baltimore, MD 21218 USA

And thanks!

Graph Theory

The bulk of my code is in support of my interest in graph theory. The following diagram shows various modules (and their dependencies) available here with SimpleGraphs being the centerpiece. (Several other modules are excluded.)

Contributing

I'm not fully comfortable with all the functionality of GitHub and my understanding of pull requests (and their management) is marginal at best. If you want to add some functionality to a package, please reach out to me directly. The easiest thing for me is if your new code sits in its own file.

Current Need

I have recently updated my SimpleGraphs module to include rotation systems (combinatorial embeddings on orientable surfaces). I have started a bare-bones SimplePlanarGraphs module. Help on this would be welcome, especialy if you're a JHU undergradaute student.

My Programming Journey

Here's a list of languages I've used over the years.

Used a lot

  • Fortran
  • Basic
  • APL
  • PL/1
  • Z80 machine code
  • C
  • C++
  • Hypercard/AppleScript
  • Java
  • MATLAB
  • Mathematica
  • Python
  • Julia

Used a bit

  • SNOBOL
  • Maple
  • Pascal
  • Perl
  • Haskell
  • bash

Markup languages

  • Script
  • nroff
  • LaTeX
  • HTML
  • Markdown

Popular repositories

  1. Print Julia objects in a form suitable for LaTeX mathematics mode.

    Julia 69 11

  2. Permutations class for Julia.

    Julia 48 12

  3. Convenient way to handle simple graphs and digraphs

    Julia 33 5

  4. Bijection datatype for Julia.

    Julia 32 5

  5. Download my book "Invitation to Dynamical Systems" and its solution manual.

    MATLAB 31 9

  6. Exact linear algebra functions

    Julia 29 2

286 contributions in the last year

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