Perhaps even more surprising, this silly claim with an even sillier name, the “hairy ball theorem,” is a proud discovery from a branch of math called topology.

This means Pythagoras’ theorem can be used to find the lengths of missing sides, such as the perpendicular close perpendicular Perpendicular lines are at 90° (right angles) to each other. height.

Here's a curious consequence of the hairy ball theorem: there will always be at least one point on Earth where the wind isn't blowing across the surface.

The lattice vectors describing the two-dimensional FLL lie perpendicular to the direction of magnetic induction , and by itself each lattice vector must satisfy the HB theorem.In this study, we ...