In mathematics, the number obtained by reading a number backwards is called the "mirror inverse" of the original number. The mirror inverse is the relationship between two numbers. For example, 1234 and 432 1 are mirror images.

Physics and mathematics are sister sciences, and they are closely related, so some physicists often have a hand in mathematics.

Dr Mei Weining is a China scholar who studies solid state physics. 1in March, 979, he relished his discovery in a letter and revealed some "mirror inversion" phenomena in natural numbers.

Next, we use the two-way arrow (←→) to indicate the relationship between the number of inverted images, so there is 12 ←→ 2 1.

The left and right natural numbers become 144 and 44 1 after being squared respectively, and still maintain the inverse mirror relationship.

Namely: 144 ←→ 44 1

13 and 3 1 are mirror inverses of each other, and the numbers obtained by their squares also maintain the mirror inverse relationship.

13 ←→3 1 169 ←→ 96 1

Moreover, the product of 12 and 13 also "infects" this neutral property.

12× 13= 156 ←→ 65 1=3 1×2 1