Emperor Wu of the Han Dynasty gradually aged. One day, he looked in the mirror in the palace and saw his white hair, haggard and unhappy. He said to the attendants around him, "It seems that I will eventually avoid death. It is not bad that I have managed the country like this, being worthy of my ancestors and the people. Only a little uneasy. I don't know if the underworld is good after death. " Dong Fangshuo replied: "The underworld is very good, the emperor can rest assured!" Emperor Wu of the Han Dynasty was frightened and even asked; "How do you know?" Dong Fangshuo unhurriedly replied, "If it's not good there, the dead will definitely flee back, but none of them have fled back, so it must be great, maybe it's heaven!" After hearing this, Emperor Wu of the Han Dynasty laughed, and his sad face suddenly disappeared.

Dong Fangshuo's wonderful theory is actually a mathematical logic, which reminds people of the famous Barber paradox in mathematics. A village stipulates that "you can't cut your hair yourself." Everyone must have their hair cut by the only barber in the village. No offense. " So who should shave the barber's hair? If others ignore it, it will violate the village rules and regulations; If you manage it yourself, it's still against the rules. Neither left nor right can be cured. It seems that the logical mystery is not unique to westerners!

Some people dream that they are talking with God. "Great Allah, what does 1000 mean in your eyes?" God replied, "only one minute." The man said, "God of mercy, please tell me what 65438+ million gold coins mean?" It's just a copper coin. Supreme God, please give me a copper coin! God said, "well, please wait a moment!" " "This means that this" greedy "person has to wait 1000 years.

There are similar fables in traditional folk materials in China. A clever matchmaker was praising a girl's virtue and good character. The outspoken young man said, "I've seen that girl, seems to be blind in one eye?" The matchmaker quickly said, "Well, other men won't give her the glad eye!" " ""I heard that she is dumb? "It's good. She won't chatter and talk too much. " Some people say that she seems to have a hand that doesn't work! ""This is a great advantage. She won't cheat. " "It is said that she can't walk on one foot?" "She is honest and won't make trouble!" "She is short!" "Can save materials! " ……

A mathematician and computer scientist thought of an interesting topic after reading this fable. This mathematician, from Tehran, was a master of creating fuzzy mathematics in 1960s. Zade. We know that the nine numbers of 0, 1, 2, 3, 4, 5... 10 constitute the basic unit that neither weighs nor leaks. Mathematicians believe that the number of 10 can be calculated by the square of 5 digits. That is to say, 12, 3, 4, ... are divided into two groups to form two 5-digit numbers, so that the sum of squares of these two 5-digit numbers is composed of 0, 1, 2, 3, ... 9, and 10, which are neither heavy nor lacking. If you want to search for "perfect" numbers by manpower alone, it is tantamount to looking for a needle in a haystack. Fortunately, we have a computer, and after some efforts, someone has achieved their goal by using it. Please read the following:

5732 12=328569704 1

609842=37 19048256

It can be seen that mathematical thinking is not only reflected in the field of mathematics, but also permeated in literary stories.