1十l=How many why?

It depends on how you understand it;

1. Take something in your hand and put it under your arm and it will be gone. 1+1=0

2. Two people get married to form a new family. 1+1=1

3. Children’s calculation mathematics. 1+1=2

4. Two people get married, give birth to a child of love and become a family of three. 1+1=3

5, 1+1 equals neither three nor four.

6. 1+1 equals 11.

7. 1+1 equals King

8. 1+1 equals Tian

9. Goldbach’s conjecture; 1+1 equals the crown jewel of mathematics,

10. In binary system. 1+1=10,

11. In Boolean algebra. 1+1=1,

12. A cat plus a mouse equals a delicious meal.

This is a question that has not yet been solved.

Equal to two in mathematics. Less than two in chemistry. More than two in life!

It seems to be a simple question. If you really want to know why even children may laugh at you, the great mathematician Chen Jingyun only studied why 1+2 equals 3. Why 1+1 equals 2 is not a simple question. The problem, 1+2=3: known as the crown of mathematics in the mathematics community. 1+1=2: The mathematical world calls it the crown jewel of mathematics. It remains to be developed by us.

That is, in the field of mathematics, Goldbach proposed a conjecture that even numbers = prime numbers + prime numbers, which is simply expressed as 1+1=2. Now the great mathematician Chen Jingyun has pushed this conjecture to even numbers. = Prime number + Prime number * Prime number, which is still a little short of Goldbach's conjecture. So, I don’t know how much 1+1 equals...

The following is a copy and paste:

1+1=2 and the shortest straight line between two points are mathematical algebra respectively. and the cornerstones of mathematical geometry. The entire mathematical edifice is built on these two seemingly simple but unbreakable axioms.

Also, I think the 1+1 you asked about should refer to Goldbach’s conjecture, right? This has not been proven yet, but Chen Jingrun proved that 1+2=3 in the last century.

In 1966, Chen Jingrun of China proved "1 + 2" [in layman's terms, it means big even number = prime number + prime number * prime number or big even number = prime number + prime number (note: the prime numbers that make up the big even number It cannot be an even prime number, it can only be an odd prime number. Because there is only one even prime number among the prime numbers, which is 2)].

The "s + t" problem refers to: the sum of the product of s prime numbers and the product of t prime numbers

The '1+1' in Goldbach's conjecture refers to The sum of a prime number and a prime number.

Goldbach’s conjecture seems simple, but it is not easy to prove it, and it has become a famous problem in mathematics. In the 18th and 19th centuries, all number theory experts made no substantial progress in proving this conjecture. It was not until the 20th century that a breakthrough was made. To directly prove that Goldbach's conjecture does not work, people adopted a "detour tactic", which is to first consider expressing even numbers as the sum of two numbers, and each number is the product of several prime numbers. If the proposition "Every large even number can be expressed as the sum of a number with no more than a prime factors and another number with no more than b prime factors" is recorded as "a+b", then the Gothic conjecture is to prove" 1+1" is established.

In 1920, Brun of Norway proved "9+9".

In 1924, Germany's Rademacher proved "7+7".

In 1932, the British Estermann proved "6+6".

In 1937, Ricei of Italy successively proved "5+7", "4+9", "3+15" and "2+366".

In 1938, Byxwrao of the Soviet Union proved "5+5".

In 1940, Byxwrao of the Soviet Union proved "4+4".

In 1948, Renyi of Hungary proved "1+c", where c is a large natural number. In 1956, China's Wang Yuan proved "3+4".

In 1957, Wang Yuan of China proved "3+3" and "2+3" successively.

In 1962, Pan Chengdong of China and BapoaH of the Soviet Union proved "1+5", and Wang Yuan of China proved "1+4".

In 1965, Byxwrao and BHHopappB of the Soviet Union, and Bombieri of Italy proved "1+3".

In 1966, Chen Jingrun of China proved "1 + 2" [in layman's terms, it means big even number = prime number + prime number * prime number or big even number = prime number + prime number (note: the prime numbers that make up the big even number It cannot be an even prime number, it can only be an odd prime number. Because there is only one even prime number among the prime numbers, which is 2)].

The "s + t" problem refers to: the sum of the product of s prime numbers and the product of t prime numbers

The mathematicians in the 20th century used the formula used to study Goldbach's conjecture The main methods are advanced mathematical methods such as sieve method, circle method, density method and trigonometric sum method. The idea of ????solving this conjecture is like "narrowing the encirclement", gradually approaching the final result.

Thanks to Chen Jingrun’s contribution, mankind is only one step away from the final result of Goldbach’s conjecture, “1+1”. But in order to achieve this final step, we may still have to go through a long exploration process. Many mathematicians believe that if you want to prove "1+1", you must create new mathematical methods, and the previous methods may not work.