In the living room on the first floor of the residence. Zhan Guyue was alone, pacing back and forth on a small piece of ground. His thoughts became more and more intense, as if he was forced to make some decision immediately. It can be seen from his expression that he is sometimes hesitant, sometimes impatient, and sometimes excited. These expressions alternated, reflecting his inner thoughts.
Zhan Guyue called Dong Chu and Liu Mozhi over to the living room, put up the whiteboard, and drew a map of the town. Liu Mozhi placed several photos at corresponding locations on the map. From north to south, there are mountains, rivers, woods, lakes, grain fields, bungalows, shops, and high-rise buildings.
Zhan Guyue said: "I guess so."
"The lake water is calculated as a percentage of the total lake water in the total area including the shallow water area, similar to calculating probability. The walking of the sheep on the mountain is to see which sheep finds the highest mountain first. Some are locally highest, and some are globally highest, like an optimization process. . The house is a neural network, with an input layer and an output layer. The numbers are weights and thresholds. The last person who comes out represents the feedback error. The numbers are placed in letters. The models are high-number models, and their volumes are calculated. Straight lines on the flat ground and rotating circles represent functions of complex variables. A tall building represents linear algebra, an energy meter might represent a number at each location, and two buildings represent matrix multiplication. The line in the middle of the woods is a curve fit to the location of the tree, but the line and wooden support are Taken away. Rivers and trees are correlation calculations, but the telescope is taken away."
Zhan Guyue finished speaking in one breath, as if he was afraid that he would forget. Dong Chu and Liu Mozhi listened as if they still didn't understand something.
"This is very much like Mr. Tang's arrangement. The area of the lake is calculated by the Bayesian probability formula. The walking of the sheep on the mountain is an optimization process. The house is a neural network, and the last person who comes out represents the feedback error. The model is a high-level mathematical model models and calculate their volumes. The straight lines and circles on the flat ground represent complex variable functions. The tall buildings represent matrices and linear algebra, specifically matrix multiplication. The woods and the lines in the middle are curve fitting and linear regression. The rivers and trees are correlation calculations. .”
Dong Chu said: "Each scenic spot here represents a mathematical process."
Liu Mozhi said: "Why did he do this?"
Dong Chu said: "I think this is a way for him to study mathematics. The mathematical process may be derived using formulas. But he wants people to participate. Then there will be information about interacting with people in the mathematical formulas."
Liu Mozhi said: "Is it information? Or can we see traces of human involvement."
Dong Chu said: "Look at a mathematical formula, such as a parabola or an ellipse. Or I can draw a line on the blackboard."
"Then the elliptic curve is most likely to have no artificial interference. The points on the elliptic curve all form an additive group, and the "addition" operation between points is precisely because the elliptic curve has an additive structure, so it contains many important Number theory information. The elliptic curve and its Jacobian variety are isomorphic. The parabola is added to the consideration of physics. The parabola refers to the trajectory of a point in the plane that is equal to a certain point and a certain straight line. The fixed point is called a parabola. The focus and fixed straight line are called the directrix of the parabola. This is the same trajectory when an object is thrown."
"Although the lines drawn casually can be represented by mathematical formulas, they are more complicated. That is, more human interference factors are added."
Zhan Guyue said: "I think it is necessary to record the password."
Dong Chu came out of his thoughts and said, "It might be the legendary data interface."
Zhan Guyue said: "Cameras are placed in many places, not to take pictures of people, but to observe the changes in things, and the changes in calculation results are to be able to recognize images and calculate numerical results. There are robot cameras on mountain peaks, lake houses, and grain houses. There are cameras next to the bungalow, and the store’s camera is facing the model on the stone table. There are numbers on the electric energy meter in the corridor of the high-rise building.”
"This password is not static, it is dynamic."
Dong Chu asked, "Where is it?"
Liu Mozhi said: "I remember the numbers near the robot charging pile. Is it the latitude and longitude?
According to this number, they found the place corresponding to the longitude and latitude, which was a grassland. They searched for a long time in the grass, back and forth. But it's all weeds and nothing else.
“If not latitude and longitude, what is it?”
"Like a house number."
They took out maps of several towns and found the location corresponding to the house number, which was where Mr. Tang originally organized the meeting.
They found the conference hall, looked around, and saw a suitcase in the office next to it. You need to enter the electronic password above, which is an eight-digit password.
They remembered the numerical results from eight places that day.
The area of the lake is calculated using the Bayesian probability formula, which is fixed. The walking of the sheep on the mountain is a process of optimization, and the sheep at the top change during the day. The house is a neural network, and the person who comes out last represents the output result. If the input is determined, the output is determined. The models are high-number models, and their volumes can be calculated with certainty. Straight lines and circles on flat ground represent complex functions and are certain. The tall buildings represent matrices and linear algebra, specifically matrix multiplication and change. The woods and the middle line are curve fits, linear regression, and are ok. Rivers and trees are related calculations and are deterministic.
The problem is that some numbers change. How can we determine what the final number is?
Maybe when the matrix is multiplied, the value inside is not the data of the electric energy meter, but the house number.
Maybe the numbers change every day.
The most difficult thing is the numbering on the sheep. There is no way to predict which sheep will be highest on the mountaintop. There is no way to predict the behavior of humans and animals.
Then its highest position can only be predicted by statistical sheep behavior.
They ran to the hillside and observed it for a long time, and found that those sheep liked to climb to the highest point. These are the numbers.
Dong Chu said: "What is the order of the password numbers? Try the order from north to south and from south to north." After trying it, it showed that the password was wrong.
Zhan Guyue said: "The order may be according to the order of the trails marked on the map of several towns."
Liu Mozhi said, "I took a photo when I passed the map. I have a photo of this."
According to the order of the trails marked on the map, they should be shops, high-rise buildings, lakes, mills, woods, mountains, rivers, and bungalows. The corresponding content is: advanced mathematics, linear algebra, probability theory, complex variable function, regression, optimization process, correlation calculation, and neural network. "
But after trying it, it still didn't open.
"Why does Jiang Jue want us to come?"
"We need to find Mr. Tang. Mr. Tang designed the new computing network, but has given up his fame and lives in seclusion in several towns. Mr. Jiang thinks this is a loss to the computing community and wants us to come to Mr. Tang to discuss it."
