It is said that learning math is boring, however there are many joyful and profound theorems in math that are puzzling. Below I have compiled a list of the oddball theorems in math, see what else you don't know about math theorems!

Nine of the weirdest theorems in math

1, Bayes' Theorem

2, Bott's Periodicity Theorem

3, Closed Image Theorem

4, Bernstein's Theorem

5, Immovable Point Theorem

6, Briensand's Theorem

7, Brown's Theorem

8, Bezou's Theorem

9, Borsuk-Ulam Theorem

Five Interesting Theorems of Mathematical Oddities

Theorem 1: A drunken drunk always finds his way home, while a drunken bird may never make it home.

Suppose there is a horizontal straight line that starts from a certain position and has a 50% probability of going 1 meter to the left and a 50% probability of going 1 meter to the right each time. What is the probability that it will eventually return to its starting point after traveling infinitely randomly in this manner? The answer is 100%. In a one-dimensional random walk, as long as it takes long enough, we always end up back at the starting point.

Theorem 2: If you lay a local map on the ground, you can always find a point on the map where the point on the ground below that point is exactly where it is on the map.

That is, if you draw a map of the entire mall on the floor of the mall, you will always be able to make a precise "you are here" mark on the map.

Theorem 3: You can never straighten the hairs on a coconut.

Imagine a sphere with a hairy surface. Can you smooth out all the hairs without leaving a single hair like a cocklebur or a whirl of hair? Topology tells you that it can't be done. It's called the hairy ball theorem, which was also first proved by Brouwer. In mathematical terms, this means that there can be no continuous unit vector field on the surface of a sphere. This theorem can be generalized to higher dimensions: for any even-dimensional surface of a sphere, a continuous unit vector field does not exist.

Theorem 4: At any point in time, there are always two points of symmetry on the Earth that have exactly the same values of temperature and atmospheric pressure.

The Polish mathematician Stanis?aw Marcin Ulam conjectured that given any continuous function from an n-dimensional sphere to n-dimensional space, there are always two points on the sphere symmetric to the center of the sphere that have the same function value, and this conjecture was proved by the Polish mathematician Karol Borsuk in 1933. This is the Borsuk-Ulam theorem in topology.

Theorem 5: Given any ham sandwich, there is always a knife that cuts it so that the ham, cheese, and bread slices are all divided into two equal parts.

And what's even more interesting is that the name of the theorem is really the ham sandwich theorem. It was developed by the mathematicians Arthur Stone and J.J. Bowen. It was developed by mathematicians Arthur Stone and John Tukey. It was proved by mathematicians Arthur Stone and John Tukey in 1942, and is of great importance in measure theory.