There is a saying called "Knowledge is power". This sentence is absolutely true and it is an irrefutable truth. In fact, knowledge is more than just power. In different industries and fields, knowledge is a decisive driving factor. In the economic world it is wealth, in the medical world it is life, and in war, knowledge is powerful combat power! During World War II, the core secret of why the U.S. military was able to rise was to put a large number of scientific and technological achievements into war practice, develop a large number of advanced weapons and equipment, and gain an advantage in the war against Germany and Japan.

During the Anti-Japanese War, China had a weak national power and backward technology, but it also had a group of world-class scientific and technological talents. Many scientific and technological talents who are determined to change China's poverty and backwardness have worked hard and put in far more sweat and even blood and tears than their Western counterparts. They have achieved scientific achievements that are no less than those of foreign countries, and they have also made outstanding contributions to the Anti-Japanese War with their knowledge. Today we will introduce how the famous mathematician Hua Luogeng used mathematical knowledge to contribute to the Anti-Japanese War.

During the Anti-Japanese War, Mr. Hua Luogeng was already a world-class mathematics master. He graduated from Cambridge University in the UK and taught at the Southwest Associated University in Kunming after returning to China. Like all Chinese intellectuals during the Anti-Japanese War, he not only immersed himself in writing and lectures, but also worked hard to find opportunities to serve the motherland.

In 1943, Yu Dawei, director of the National Ordnance Industry Department, found Hua Luogeng

As soon as they met, Hua Luogeng guessed that he had something to ask for without Yu Dawei opening his mouth. Sure enough, Yu Dawei told him that the Japanese army's code had been upgraded in recent times, and the national army's cryptography experts could not decipher it no matter how hard they tried. At that time, Chinese cryptography experts once deciphered the telegram that the Japanese army would attack Pearl Harbor. Even American cryptography experts were amazed that these capable experts also encountered difficulties. It seemed that the Japanese army's new code was so mysterious.

Yu Dawei gave Hua Luogeng a piece of the latest Japanese military code. They were all random numbers, as if they were randomly selected. Mr. Hua Luogeng took it and said solemnly: "Okay, let me try it!"

As mentioned earlier, many cryptography experts are actually mathematicians. Why? There is a saying in ancient Greece: "Mathematics is the key to understanding the mysteries of all things in the world."

This is true. Science has proven that the operating laws of many things can be analyzed using mathematical principles, and even some mathematicians He joked: "The development of mathematics has an infinite future. In the future, even the emotional development of a girl in love can be calculated using numbers." A bunch of numbers that seem chaotic and illogical, mathematicians can use mathematical knowledge to find reveal its inner subtle rules.

Hua Luogeng is proficient in number theory. This subject is the "brother" of cryptography and can be understood by analogy, so Hua Luogeng accepted this task with confidence.

Hua Luogeng locked himself in the room and no one was allowed to enter. From morning to night, I have been sitting at my desk, trying to analyze it in different ways. It was late at night, and in order to refresh himself, Mr. Hua smoked cigarettes one after another and meditated hard. Yu Dawei left an agent to protect Hua Luogeng. He was afraid of disturbing him and sat quietly in the corner without saying a word. I stayed with Hua Luogeng like this all night, and fell asleep leaning against the wall.

After an unknown amount of time, Hua Luogeng patted the agent gently, handed him a piece of paper filled with mathematical formulas, and told him: "That's it, I've cracked it. You can take it back. I It’s time to get some sleep.”

The agent returned immediately, and Yu Dawei was surprised when he heard that Hua Luogeng had completed the deciphering in just one night. He took the piece of paper and looked at it carefully. Yu Dawei was not just an ordinary person, he was also a scholar who studied abroad.

After he looked carefully, he found that Hua Luogeng had repeatedly calculated and mastered the Japanese army's code using the Mobius function. He then used the inverse function to restore the Japanese army's message to plain text: The Japanese army is about to attack the Kunming Allies. Conduct a sneak attack on a military airport. Thanks to this cracked message, the Kunming Flying Tigers took precautions early and prevented the Japanese from succeeding.