Prove that a 2 2 matrix A is reducible if and only if a12a21 = 0.

▯ Cindy Sherman’s “horizontals” Trying to emulate cinematic qualities and center-folds Extreme close-ups, giving intimacy Implied violence in all her photographs ▯ Nikki S. Lee: Subcultures in Manhattan and performance art All time stamped Point and shoot camera Look like authentic amateur shots that...