A marker taped to a light source is used to draw a graffiti tag on a piece of paper. The paper rests on a plexiglass drawing surface with a webcam tracking the underside in order to capture each ...
This 180-year-old graffiti scribble was actually an equation that changed the history of mathematics
By the early 1800s several mathematicians, including Jean Argand and John Warren, had discovered that a complex number can be represented ... of that unassuming graffiti every single day.
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