The Pythagorean theorem, or Pythagorean theorem, is a must-learn knowledge included in the nine years of compulsory education.

"In a right-angled triangle on a plane, the sum of the squares of the lengths of the two right-angled sides is equal to the s-power of the hypotenuse. Here S is commonly known as the Pythagorean constant, which is approximately equal to 2.013. The math teacher listed the formulas on the blackboard as he spoke, and a confident senior teacher like him could memorize the content of each lesson without reading the textbook, so he had never opened the book once since he entered the classroom.

"It's another irrational number, it's really troublesome to calculate!"

"What if it was equal to the square of the hypotenuse? I can figure it out in a second. ”

The teacher turned around and knocked on the podium, and the two people who were talking to each other were instantly silenced, and sat down pretending to be listening carefully.

"The Pythagorean constant does not require you to memorize it, you can usually get 2, if the question requires 2.013, the data will generally be given in the question, and you can copy it. He explained the main points of the exam, and put his hand on his eyes, and a little chalk ash was stained on the frame, which was not very visible.

It's like people don't notice that their world has changed somehow.

The top students who opened the textbook and were about to take notes seriously were suddenly stunned, repeatedly comparing the handwriting on the blackboard with the content of the book, and still couldn't help but raise their hands.

……

In a place that was recently divided by the Chinese National Academy of Sciences, several scientists with considerable meteorological attainments are monitoring the data transmitted back from the Taklamakan in real time and conducting further calculations based on this data.

"Xiao Feng, come and take a look. Xu Changwang, the leader of the project, beckoned Feng Liang over, and his wrinkled face was full of solemnity.

Feng Liang immediately handed over the work in his hand to another person in the same group, and walked over quickly, "What's wrong?" ”

Although they are now working together in the same unit and their ranks are almost the same, Feng Liang is a doctoral student who came out of Xu Changwang's door, and it is not an exaggeration to call him a "teacher".

"Look at this. Xu Changwang put the just-completed forecast data in front of him.

Feng Liang thought that there was a mistake in the middle, and after reading it carefully, he said, "The process is fine." ”

"But the actual data is like this. ”

"It's a bit of a big deviation. Feng Liang finally knew why he had that expression just now, and now his own expression was probably not much easier.

Meteorological calculations are difficult to guarantee absolute accuracy because there are so many factors that can affect the final result. But if you are willing to pay a sufficient price, you can also increase the accuracy of your calculations to an astonishing degree.

Naturally, they can use the computing resources in the Academy of Sciences at will for this project, and it stands to reason that the error should not be so large.

What went wrong?

Xu Changwang looked at the display screen sadly, and for a while he couldn't think of any other way than to recalculate. What else can I do? Let's try again.

Even if this experiment does have an impact on the global climate, it is all within the control of the ring. The pressure left to them was not so urgent.

If most meteorological calculations are done by computers and errors can be corrected at any time, then calculations for other scientific projects are crucial.

In particular, some experiments that require extremely high experimental environment and precision have almost completely collapsed. In addition, the reason for the error could not be found in a short period of time, and the experimental project had to be suspended for a comprehensive inspection.

Such anomalies occur all over the world, but they are particularly acute where data accuracy is required.

One or two things may just be a coincidence, so many cases can only be really wrong.

Almost all countries immediately pulled back their eyes on Huaxia and began to investigate the reasons behind this.

After considering all the possibilities of the earth's magnetic field, cosmic radiation, supernatural forces, etc., which are reasonable and unreasonable, and nonsense, they found that the answer has already been spread on the Internet.

The cause is the Pythagorean theorem that contains the Pythagorean constant in a certain country's mathematics textbook.

Anyone around the world who knows this theorem must know the Pythagorean constant, perhaps as some call it, the Pythagothral constant – the super-cumbersome "2.013" to calculate.

As we all know, this is an irrational number, but it is an approximation of 2.013.

In mathematics, there are still many such irrational numbers, all over the formula, from the most basic area calculations to advanced functions.

Their existence makes countless people daunted by the subject of mathematics - not because of the difficulty of logical thinking, but because of the tedious and boring calculation.

Until a student who was new to the Pythagorean theorem was the first to discover that what was written in the book was something else entirely.

The sum of the squares of the two right-angled sides of a right-angled triangle is equal to the square of the hypotenuse.

It's just squared, without that annoying 2.013!

He read his book several times in disbelief, pulled the book on the same table to reconfirm, and finally stood up: "Teacher, what you said seems to be different from what is written in the book." ”

From this moment on, mathematics in the perception of all mankind was turned upside down.

"This can't be! How can this constant be a rational number?"

More and more people are looking through all the information they can find, only to find that the symbols written in black and white are completely different from those in their previous memories.

"That's not right...... That's not what I did when I learned this!"

But the fact that every book contains "wrong" formulas forces people to doubt their own perceptions.

Are they all crazy, or is the world crazy?

As more and more people knew, panic and confusion swept over irrepressibly.

Even ordinary people who are not in the field of mathematics know the importance of this subject.

Compared with mathematics, all other sciences have to take a back seat.

"Doesn't it say that mathematics is the truth of the universe, and now even the truth is wrong?"

"Did I wear it or did the whole world wear it? No, if the math theorems were changed, how could the world still be the way it was?"

"Is this the end of the world?"

"No! it can't be! I must be dreaming!"

"It took me a full ten minutes to come back to my senses when I knew the news...... Now I have seen through life and have no fear. ”

"I'm just a mathematical theory collapse, are you going to live and die like this? How should you live or how should you live, one plus one is still equal to two, not one plus one equals three!"

"You know, that means our civilization will go back at least a hundred years! If there is no solution, you see how long life can last!"

Today's people who sit in the classroom and learn the knowledge accumulated over the past hundreds of years may not think that every bit of progress in mathematics is hard-won.

Behind any breakthrough is the dedication of countless mathematicians – and how many of them can now compete with the great mathematicians of history? Can they fill this void and put the strayed human civilization back on track?

"The formula is wrong, the constant is rewritten...... I'm afraid it's going to be a big mess. ”

Either way, it will take some time to climb back to the original level of mathematics, and during this time, the progress of human civilization will completely stagnate or even regress.

"What's so troublesome! Isn't the correct formula in the book? Are you stupid to have to re-deduce?"

"......" seems to be a clam!