An unknot (also known as the trivial knot) can be drawn with any number of crossings. Any possible manipulation of a knot ...

When fifth-grade teacher Ana Sanchez handed out the math pop quiz Tuesday before lunch and recess, none of the students were excited. No talking allowed, Sanchez reminded her students at Mount Rose ...

Differential equations are fundamental tools in physics: they are used to describe phenomena ranging from fluid dynamics to general relativity. But when these equations become stiff (i.e. they involve ...