The despondent professor watched her students file out of the classroom. When the last one disappeared into the hallway crowd, she turned to the scrawled equations on the blackboard, arms crossed.
Big O notation, algorithmic complexity. As far as ultimate lessons go, she thought, she could’ve done much worse. Her eyes followed the mathematical expressions downward to their beautiful conclusions. She sighed, wiped the board clean.
Marinne sat down, stooped over her desk, when a gentle knock came on the door frame.