# Alejandro Erickson

Low production value innovation.

Projects

## Proset MMO Perpetual Card Game

This is Proset.  I don't know who invented it, but I made it into a massively multiplayer perpetual card game.

Instructions (in MathSpeak): Each card is a binary vector.  Select a set of cards by clicking on them.  If the set adds to the "zero" card, press spacebar to get a point.  You can give yourself a name in the bottom right.

Instructions (in English): Select some cards by clicking on them.  If the number of dots in each position is even, press spacebar to get a point.  Another way of seeing it, is imagine that you pile the cards you selected.  Each time two dots pile up, they cancel out.  You can give yourself a name in the bottom right.

Instructions (in Simple English):  Mash keyboard.  Hope for points.

Example of a good set:

video chat provided by Tinychat

# New features and polish are coming!  Please add feature requests in the comments.  I expect to have time to add things in October.

Last Updated on Tuesday, 21 September 2010 08:59

## Slidecast presentation: Negative correlation properties for graphs

My Master's thesis was called Negative Correlation Properties for Matroids and I have made the more accessible part into a talk.  I posted a practice run as a slidecast on slideshare.net.  Attached are the slides themselves and when the paper is finished I will link to a preprint.

 erickson-negative-correlation [ ] 1298 Kb
Last Updated on Sunday, 11 April 2010 18:08

## An Expository Paper on “A Theorem on Paths in Planar Graphs” by Carsten Thomassen

This was one of my first course projects of notable size which I did at SFU during my undergrad.

 carsten-thomassen.pdf [An ExpositoryPaper on “A Theorem on Paths in Planar Graphs” by Carsten Thomassen] 665 Kb

## Tape tracking NXT Lego Mindstorms Robot

The code is in NXC and I used the NXT Camera.  To follow the line, the robot uses a simple PID. The robot uses the sonar to find objects by the road. It uses the light sensor to detect whether it found the right object.

Last Updated on Tuesday, 06 April 2010 22:49