Pang Xuelin has found a way to climb Mount Everest.

After more than 1,000 days and nights, more than three years of uninterrupted thinking and research, he finally touched the edge of the universe of number theory.

The hard ice began to break and melt, and the deep prime structures that lurked beneath the ice gradually surfaced.

The framework system of Far Abelian geometry was completely crushed and reorganized by him, and a new set of mathematical theories was quietly brewing.

Chaowen said, you can die at night!

An unprecedented sense of pleasure welled up from his heart, Pang Xuelin closed his eyes, opened his arms, and embraced the starry sky.

It's a long-lost joy.

The last time I felt this happiness was when Pang Xuelin proved the André-Oort conjecture under the condition of polarized Abelian clusters.

But the level of pleasure can't be compared to this time.

As for the BSD conjecture, it is not to mention, it has nothing to do with Pang Xuelin at all.

Over the years, the reason why Pang Xuelin was able to embark on the academic road of mathematics as his grandfather wished, and became a full professor of Jiangcheng University at a young age, is only because he feels that mathematical research is simple and happy, especially the joy of exploring the truth, which cannot be replaced by anything.

Thanks to Mars, thanks to this quiet and barren world, he can really calm down and think about something essential.

If in the real world, even if it is at Jiang University, Pang Xuelin is likely to be affected by various pressures, and it is difficult for him to have the opportunity to calm down and continue to think about a proposition that is unlikely to produce results for three years.

He didn't even have the idea of doing something as obscure as Far Abelian geometry.

But here he succeeded.

A whole new world of mathematics has been opened up by him, waiting for him to pioneer.

Far Abelian geometry, no, perhaps more accurately, should be called Ponzi geometry.

Pang Xuelin absorbed the essence of Far Abelian geometry and carried out a drastic reform of its framework system, which can not only accurately describe the similarity between the addition structure and the multiplication structure, but also the property of the power.

It's a completely new system of mathematics, and it's rightly named Ponzi geometry.

Moreover, Pang Xuelin faintly felt that in the future, as long as he slowly filled this theory with flesh and blood and filled all kinds of loopholes, he would not only be able to perfectly solve the ABC conjecture, but even the Goldbach conjecture, the twin prime conjecture, the hail conjecture and other famous problems in the field of number theory.

It's just that now, this theory is still quite immature, and Pang Xuelin has only thought of a preliminary framework structure, and he can't predict how long it will take him to complete this theory.

Unfortunately, in more than a month, my long journey to Mars will be completely over.

At that time, whether it is in the Martian world or in the real world, I am afraid that I will not be able to devote myself to research as I have done in the past few years.

……

A month later, the Ares-4 mission team successfully arrived on Mars, and with the help of Pang Xuelin's habitat module, the members of the Ares-4 mission team conducted a month-long expedition on Mars.

As an old bird who has lived on Mars for many years, Pang Xuelin naturally accompanied these rookies throughout the whole process and participated in scientific expeditions.

Subsequently, Pang Xuelin and the Ares 4 mission team came to Hermes on a MAV (Mars Liftoff Vehicle).

After nearly a year of flying, Hermes successfully returned to Earth and docked with the International Space Station in geosynchronous orbit.

In the space station, waiting for Pang Xuelin is Watney, who has not been seen for a long time.

After catching up, Pang Xuelin went through a few days of physical examination and adaptation in the space station to ensure that there were no problems, and then he returned to Earth on the synchronous orbital shuttle.

The shuttle slowly landed on the airport, and he was greeted by a sea of people, and there was a tsunami of applause and cheers everywhere.

Pang Xuelin smiled, stepped out of the shuttle, and stepped on the ground.

At the same time, the long-lost voice of the system sounded in Pang Xuelin's ears: "The task is completed, and the evaluation is underway...... The evaluation is completed, the mission completion degree S, congratulations to the host, get the astronaut's eye, and the system will randomly select a technology from this plane as a reward. ”

A huge lottery interface instantly appeared in front of Pang Xuelin's eyes, and the lottery wheel was divided into six areas, representing six technologies.

The six technologies are:

1. The ion engine on board the Hermes.

The 1.5-megawatt engine is fueled by argon atoms, which are ionized by a shipboard nuclear reactor that ejects them at high speed, giving the Hermes 0.2 meters per square second. This engine can be used for planetary system travel and is the best power source for planetary system spacecraft.

2. High-power radioisotope nuclear battery (RTG)

At present, the total power of the most advanced radioisotope nuclear battery in the world (including electrical power and thermal power) is at the 100-watt level, and the electrical power is about four or five watts. The Martian plane nuclear battery has reached the kilowatt level, with a thermal power of more than 1,600 watts and an electrical power of 100 watts, which is a power supply artifact for space unmanned aerial vehicles.

3. Oxygenator molecular sieve

Super carbon dioxide absorber, with special physical and chemical properties, as long as sufficient power is provided, it can continuously absorb the carbon dioxide produced by human respiration and convert it into oxygen, which plays an extremely important role in the field of manned spaceflight and deep space exploration.

Fourth, the combined engine on the earth orbit shuttle.

The engine adopts a combination of turbojet + sub-combustion ramjet + scramjet + rocket engine, which can make the aircraft shuttle freely in the atmosphere, near space and between geosynchronous orbit, and is an artifact used by human beings for near-earth space flight.

5. Flexible metamaterial aerogel

The material is a three-dimensional graphene aerogel macroscopic body, which can show excellent properties of graphene materials at the macro level, such as up to 99% recoverable compressive hyperelasticity, a wide range of adjustable Poisson's ratio characteristics, high conductivity, stable piezoresistive effect and ultra-low thermal conductivity, etc., which plays an important role in aerospace, flexible drives, flexible robots, sensors, deformable electrode materials, drug delivery and delivery, ultra-light thermal insulation and protective materials.

6. MDV (Mars Landing Vehicle)

The soft landing technology on the surface of Mars has always been one of the important problems of manned landing on Mars, and the MDV uses a combination of parachute + rocket engine to enable eight astronauts to land safely on the surface of Mars, which is of great significance for human manned interplanetary exploration.

……

Pang Xuelin's gaze swept over the six sectors on the roulette wheel one by one, compared to the last trip to the three-body world, this time the Martian plane, the rewards provided by the system are basically practical engineering technology. Moreover, most of them are manned spaceflight, whether it is high-power ion engines, radioisotope nuclear batteries, oxygenator molecular sieves, combined engines, flexible metamaterial aerogels, and MDVs, all of which are of great significance to human aerospace engineering.

However, in comparison, the high-power ion engine and the combined engine on the shuttle are a little more valuable, the former is suitable for human interplanetary deep space exploration, and the latter is more realistic.

Since the retirement of the U.S. Space Shuttle, the current human space vehicles are still dominated by rockets, and it is difficult to change in the next ten or twenty years.

The emergence of this combined engine can make the era of aerospace aircraft come decades earlier, and it has a huge attraction for any country.

In comparison, the other technologies are less significant.

"System, let's draw!"

Pang Xuelin said lightly.

The roulette wheel began to spin rapidly, and after a minute, the pointer of the roulette wheel stopped on the flexible metamaterial aerogel.

"Congratulations to the host for obtaining the extremely relevant preparation process of metamaterial aerogel."

"Hoo ......"

Pang Xuelin can't say how disappointed he is, compared with the strategic heavy equipment that the combined engine can improve a country's aerospace strength, the metamaterial aerogel is undoubtedly much weaker.

But even if he draws a combined engine, how to explain its origin and hand it over to the state is a big problem, and this kind of metamaterial aerogel, which has excellent money, is a good choice.

"Host, the lottery is over, and you can choose to stay on the Martian plane for another one to two years, or you can return to the real world directly!"

"Let's go straight back to the real world!"

Pang Xuelin sighed and said.

As a hero who has lived on Mars for more than 1,700 days, even if Pang Xuelin stays on the Martian plane, he will not want to be quiet in the future.

What awaits him is probably a variety of endless activities and interviews, as well as all kinds of honors.

None of this meant anything to him.

He'd already met Watney anyway, and he had fulfilled his greatest wish in the Martian world.

"Goodbye, Watney!"

"Goodbye, Mars!"