On the fourth day, the Gliese civilization held another mathematics conference, because Zhang Yuan himself is a mathematics expert, and he has not slackened his studies over the years, so he is obliged to participate in this conference on behalf of mankind.

All the explanations are very profound, and what shocked Zhang Yuan was that other disciplines would not comment on it for the time being, the mathematics of this civilization is indeed very powerful!

Perhaps even better than human mathematics!

In human society, there are many mathematical directions, and even the foundation has not yet been laid, but it has been perfected and confirmed by the Gliese civilization!

"I have one more question about this idea of yours. By the way, in our language, it's called the Hodge conjecture......"

"Our best idea at the moment is ......"

After 3 hours of discussion, Zhang Yuan became more and more excited, and his old face turned red.

As if a raging flame burned in the chest, this kind of communication does have a hearty sense of pleasure!

Of course, human mathematics did not disgrace Zhang Yuan, and the "Great Unification of Mathematics" project, as well as some grand programs, including a small part of the historiography of the new civilization, plus the extraterrestrial paper that was deceived from Zero-XZ, also made the other mathematician cry out and be surprised.

There is a great surprise in the direction of thinking of both sides, and there are many places where mathematics alone can make up for each other.

At the end of the meeting, Zhang Yuan deeply understood the benefits of this mutual exchange between different races.

There are some wonderful ideas that, if you follow the human mind itself, may never have imagined.

He secretly thought in his heart: "If a civilization is broad-minded enough, an alliance of multiple civilizations will inevitably be stronger than a single civilization......

“…… Mr. Ambo, the mathematics you have given is indeed a very remarkable achievement. But I noticed that they were all forty or fifty thousand years old...... Can you tell us a little bit about your latest math progress? ”

When he walked out of this conference room, Zhang Yuan asked casually.

Mathematics is such a thing, black and white, right is right and wrong is wrong, and when you meet someone you can communicate with, you can really quickly close the distance, and even race is not very important.

Anyway, these things can be said to be high and low, and it is too difficult and difficult to convert them into productivity.

The Gliezer professor named "Ambo" had fallen into an almost frenzied state in this mathematics conference, and even after the conference was over, he was still a little unsatisfied, and kept asking questions after Zhang Yuan.

However, hearing Zhang Yuan's inquiry, its fanaticism seemed to have been suddenly extinguished by a basin of cold water.

"Well, it's not that I don't want to say it...... "Amber sighed, "it's really ...... Not worth mentioning! It's not worth mentioning! ”

It left very depressed, and before leaving, it was as if its entire back was clumped.

Returning to the residential area and asking a few more partners, Zhang Yuan suddenly found that almost all the content of the exchanges in the past few days was the excellent culture before the emergence of the second alien civilization.

There has been nothing since the second extraterrestrial civilization.

Zhang Yuan had some vague guesses in his heart, "In other words, after the second interstellar civilization appeared, did problems arise quickly......

It's weird, it's really weird......

"Even, the second interstellar civilization is not necessarily a ...... with good intentions"

"But why help them get into the age of electricity?"

Finally, a week later, all the art and science exchanges were over, and all the high-level executives came to the table to start the final negotiation of cooperation.

There is nothing good to ink, Zhang Yuan said straight to the point: "...... Dear Excellency Gan Yaduo, after such a long period of communication, we can indeed understand and appreciate each other. ”

"Cooperation is certainly the best option for both you and me. We don't have a deep hatred, and we don't have to fight for a planet. ”

"The starry sky is so vast, and our human eyes are never limited to one planet."

Zhang Yuan said tentatively: "But I want to know, what is the cooperation you want?" Is it a trade exchange between the two sides, or an exchange of science and technology? or cultural development......"

The leader of the Gliese civilization stopped talking, and then several people looked at each other, as if they had made up their minds.

Gan Yaduo suddenly said, "We...... Want a spaceship! ”

"A spaceship capable of traveling between stars, for which we can pay almost anything!"

"Including the knowledge you want, as well as a large number of production tools, can be used as a trading target."

Zhang Yuan's pupils contracted slightly, and he was taken aback in his heart, and all of a sudden, cold sweat came out of his back!

At first, he thought that the other party wanted the human "Earth Era", which was of course impossible, and after two seconds of silence, he realized that the other party was not referring to that.

"Impossible!" After rejecting the other party, he added: "...... At least for now, it's impossible. ”

"Our human civilization is indeed capable of producing stellar-class spaceships, and in its long history, more than one has been produced. But that's our powerful mother civilization, not our current sub-civilization. ”

"The current productivity is far from being able to produce stellar-class spaceships, and we need at least one or two hundred years of development...... Therefore, I cannot accept your request for the time being. ”

These are the big truths, the big truths that even fools can analyze. If humans can produce star-level spaceships, they will directly crush the Gliese civilization and negotiate a fart.

Moreover, the cost of building a stellar-class ship is simply too great, and each one will have to occupy a huge amount of the new civilization's productivity.

Even if there are plans for such construction in future plans, these ships are used to realize the "sowing plan" and the "wandering plan".

"If you sell a spaceship to the Gliezers......"

Zhang Yuanzheng frowned, thinking about the gains and losses, if just to get some knowledge, but he had to consume dozens or hundreds of years of development time of the entire civilization, then he had to consider the question of whether it was cost-effective.

"If the benefits are large enough, it's not impossible...... But if it's just math...... No way. He shook his head slightly, even though he was a mathematician and was curious to death about how to solve some mathematical problems. It is impossible for him to betray the interests of the entire human civilization out of curiosity.

The other party asked, "Then what kind of price do you think we need to pay in exchange for a spaceship?" ”

After a while, Zhang Yuan spoke again: "Your Excellency Gan Yaduo, I think you may have underestimated the difficulty of building a stellar-class spaceship. How big do you need a spaceship? How many people are carrying, and how far are they traveling? and the complexity of the ecosystem...... How many production tools do you need to carry inside? These are all things to consider. ”

"The more difficult the ship, the higher the cost...... This price...... It's hard to estimate. ”

Gan Yaduo said directly: "We have been thinking about this question for a long time. Price isn't an issue, as long as your civilization can be built...... We can afford it! ”

As a result, it actually came up with a very detailed plan, including the parameters of the spaceship's ecosystem, the population it can carry, etc., which was obviously planned for a long time, not a temporary idea!

So much so that the entire negotiation team was a little confused, and looked at each other, which was shocked.

"Wang Junpeng, what's the situation? It's impossible for me to make a direct decision on this transaction...... Earth Age cost tens of millions of engineers the productivity of the entire thirty years of construction, you know? We're ...... 500,000 now," Zhang Yuan asked softly in his headphones.

Wang Junpeng was also dumbfounded, as the first batch of diplomats to come here, he was also stunned at the moment, "I do ...... Don't know what they really think! ”

Could it be that these Gliezers also want to follow the example of humans and do a deep space colonization? It's incredible, isn't it?

"They don't want this planet?"

“……”

Zhang Yuan cleared his throat and returned to normal, he carefully pondered the plan given by the other party, his brows suddenly furrowed, and suddenly stretched.

The reward given by the other party is indeed extremely rich, not only will it give mankind precious knowledge, including mathematics and cosmology, but also give away some precious legacies left by alien civilizations!

Includes a ...... The so-called "fully automated universal factory"!