σ 1/n？ = π? /6

n= 1

This wonderful mathematical identity was deduced by Euler with the property of Bernoulli number.

The most beautiful formula in the world:

E π I+ 1 = 0 (Euler formula)

It contains the five most beautiful numbers in the world: e, π, I, 1, 0.

And Euler's cube:

0 1 48 3 1 50 33 16 63 18

30 5 1 46 03 62 19 14 35

47 02 49 32 15 34 17 64

52 29 04 45 20 6 1 36 13

05 44 25 56 09 40 2 1 60

28 53 08 4 1 24 57 12 37

43 06 55 26 39 10 59 22

54 27 42 07 58 23 38 1 1

Moreover, he proved that there was no solution to the problem of the Seven Bridges in Konigsberg, which promoted the development of topology.

For any polyhedron, V+E-F=2.

Where v is the number of vertices, e is the number of faces, and f is the number of edges;

Euler was a mathematician who worked until the last moment of his life. He had many other mathematical achievements, which I still don't know clearly. ...