Hello everyone. I'm a newbie to the study of oriented matroids, so if anyone can help me determine what I have attached, I would appreciate it! The beginning includes some notation.
Hey logicamente.
Did you try taking an arbitrary vector and expanding it out (using the M matrix) and then finding the conditions to have a +, -, or 0 in the final output?
In other words, take a random vector v and look at the sign of Mv.