Proof shorthand Question
In the rank-nullity proof David wrote during the review session, he used this symbol (file:///Users/Taylor/Desktop/11421668_10203725527331914_2073690689_n.jpg) throughout. Does anyone know what it means? Thanks!
TaylorWarrington: June 5, 2015, 4:57 p.m.
note: copy and paste the url in the parenthesis in your browser to view the symbol image!
lilb: June 5, 2015, 5:27 p.m.
lol that url only works for you