The second one to stand up was a European with a lot of white hair, and his demeanor was obviously more respectful to Emperor Chongzhen. First he introduced himself, and then he introduced what he was good at.

Dezag, a Frenchman, had a wealth of experience, having worked as a military engineer and architect, and was most accomplished in projective geometry. In his early years, he published "On the Perspective Section", which began to discuss the problem of perspective and put forward the theorem of two triangle perspectives. Just a few years ago, he published the foundational work of projective geometry, "Manuscript on Trying to Deal with the Intersection of Conic and Plane".

This person is much less famous than Fermat. Not only is the projective geometry he created unremarkable, but more importantly, his thesis borrows many botanical terms, which are not easy to understand. This is also why he heard that the Ming Empire in the Far East was recruiting talents, so he made up his mind to come to the Ming Dynasty.

It was not until 1845 that the historian of mathematics Schaller stumbled upon the manuscript of the manuscript "An Attempt to Deal with the Intersection of Cones and Planes" and publicized it. Eventually, the book was listed as one of the classics of pure geometry.

At this time, he was talking eloquently, to be honest, Emperor Chongzhen also had a little headache when he heard it. Although he has the knowledge of later generations and can understand some of them, there are many places where he doesn't know which term means.

However, for these, Emperor Chongzhen is still very patient. Although they are not Ming people, at least not yet, their spirit of scientific exploration is still worthy of admiration. Not to mention, this European had worked as a military engineer and architect, and this resume also intrigued him.

Other Europeans didn't really understand Dezag's learning, but no one could question or deny him even if he had published books, so he became one of the three most learned people.

At this time, hearing him talking about those dry and incomprehensible things again, and seeing the face of the Ming Emperor frowning and thinking from time to time, they couldn't help but be happy in their hearts, this is stumped for the Ming Emperor, right?

It was not until noon that Dezag, perhaps hungry, finally ended his story.

Emperor Chongzhen heard that the stomachs of many people below were rumbling, and Fang Zhenghua was also reminding him that it was time to eat.

So, he decreed that these Europeans should be entertained, and they would continue to talk while eating.

What is a little different from the past is that this time the reception is a buffet situation, allowing these Europeans to choose their favorite food to eat, and himself, of course, cannot be with these Europeans.

This buffet was set up in the courtyard outside the hall, Emperor Chongzhen ate in the hall, Fermat and Dezag had already interviewed, they were allowed to eat in the hall, and the others were in the courtyard, and the brocade guards at the door would not let them come without permission.

This kind of differential treatment can also reflect the difference between being interviewed and not.

What Dezag didn't expect was that after Emperor Chongzhen had eaten a little, he began to ask him questions, asking some of the questions he had told.

As soon as Dezag heard this, he immediately stood up respectfully and replied earnestly.

In his opinion, he was most afraid that his knowledge would not be understood by outsiders. Now that someone asks a question, that is the greatest respect for him, and he naturally wants to explain it clearly. Not to mention, the person who asked him questions now was still the emperor of the Ming Empire, and his status was noble, and he was the first person today.

Fermat sat opposite, and at first he listened with his ears pricked up, but after all, he couldn't understand it, so he had to continue eating: Oriental cuisine is worthy of its name!

The door is open, and people outside the courtyard can also see the inside of the lobby. Emperor Daming sat there, naturally attracting their attention, and would peek at them from time to time. So, they found out that the Ming Emperor was talking to Dezag.

It seems that the Ming Emperor is asking a question, and then Dezag is answering. From his expression, it could be seen that it seemed that the Ming Emperor was asking for advice, and Dezag answered easily.

After asking a lot of questions, Emperor Chongzhen gradually understood what Dezag was talking about, probably a branch of geometry that would be used a little more in drawing and architecture. In this regard, he does not say that he is proficient, but he can also talk about some principles and some laws in it.

Therefore, after this question was asked, he gradually went from asking questions to discussing, and in the end, some of the questions asked stumped Dezag even more, so that Dezag did not know how to explain or answer for a while.

Of course, some of Emperor Chongzhen's questions, or some explanations or something, also made Dezag feel like an initiation, and gave him a deeper understanding of the aspect of projection geometry, which made him feel overjoyed.

Unconsciously, Dezag became more and more respectful to Emperor Chongzhen, and during the conversation, he used that attitude of asking for advice.

Fermat felt this change in his attitude most intuitively. But he was not surprised by this. Because he had already felt the erudition of the Ming Emperor, he had experienced similar feelings.

And in the courtyard outside the lobby, those Europeans also slowly noticed the changes in the lobby, and for a while, they were a little surprised. Later, one spread ten, ten spread a hundred places, and anyway, they all ate about the same, and they all crowded at the door to watch the words and deeds of Emperor Daming and Dezag inside. They could feel how respectful Dezag's attitude was, and for the erudition of the Emperor of the East, it was simply amazing!

After waiting for a while, the food was withdrawn, and everyone entered the hall again, Emperor Chongzhen was a little surprised to find that it seemed that the invisible arrogance that seemed to be in these European people before was no longer felt at all. When they looked at themselves, their eyes were full of reverence, which was not seen before.

In this regard, he can naturally guess what is going on.

Seriously, in terms of natural knowledge, if they did not show up, these Europeans did have the capital to be proud of. Otherwise, those missionaries would not have been able to knock on the door of the class of great scholars and doctors with those natural knowledge.

Now that he has come to this era, he is the Emperor of the Ming Dynasty, and there are too many things to deal with. Although a lot of knowledge of later generations has been recorded for the Ming scholars to learn, however, the way of thinking of logical reasoning of natural knowledge, as well as the understanding of natural knowledge, etc., are missing by the Ming scholars, even if they are working hard, it will not be able to change for a while.

It is also for this reason that Emperor Chongzhen asked Portugal to bring Western nature books to the Ming Dynasty as much as possible, and to bring talents in this area to the Ming Dynasty as much as possible. This can bring a catfish to the academic circles of the Ming Dynasty and stir up this pool.

Then it was the turn of the last of the three most famous men in Europe, named Kircher, who was younger than Dezag, less than fifty. is a priest, but when he entered Daming, he came as an ordinary person.

He introduced to Emperor Chongzhen, saying that he had relatively high attainments in physics, astronomy, mechanics, philosophy, history, and musicology, and was also very interested in the Orient described in Marco Polo's travels.

Regarding the introduction of this Kircher, Emperor Chongzhen immediately remembered Song Yingxing, which should also be an encyclopedic character. For this kind of talent, he still welcomes it.

Kircher began to gush about his accomplishments, deducing that disease and decay were caused by the activity of microorganisms, and inventing slide lanterns, organs, and microphones. In addition to this, he was also translating Egyptian hieroglyphs......

In the end, he was completely trapped in his own world, forgetting that he was facing the emperor of the largest empire in the Far East at this time, and said excitedly: "...... I reasoned that sound would not have been able to travel if there was no air, and now I'm trying to figure out how to get rid of it......"

When Emperor Chongzhen heard this, he was already very satisfied with this talent, and the encyclopedic style was the most important thing in the Ming Dynasty at present. Therefore, when he heard what he said, he said casually: "You think about it beautifully, sound must have a medium to transmit, it can be transmitted in air, water, etc., and the clarity of its propagation is limited by the density of the medium, distance, etc., and it cannot be transmitted in a vacuum......"

Hearing him say it so surely, and in such detail, Kircher couldn't help but be even more excited, as if he had found a soulmate, and wanted to continue the discussion.

However, Emperor Chongzhen saw that there were many people behind him, and he had already made an assessment of this Kircher, so he didn't wait for him to speak again, and said to him: "We also have a person in the Ming Dynasty, who knows a lot from all walks of life, and you can communicate with each other when you go back, and you will definitely be able to gain something!" Next! ”

Hearing this, Kircher was very excited, and thought about immediately talking to the person that Emperor Ming had said. Of course, if it weren't for the Ming Emperor in front of him, he wouldn't be able to talk casually, he would definitely pull Emperor Chongzhen to talk about it first.

In the following interview process, Emperor Chongzhen found that the talents of other Europeans were obviously not as good as the previous three, and more of what they learned in the book, just according to the book, and did not explore it themselves. Therefore, the interview process in the rest of the interview process became faster and faster, and finally everyone was interviewed before dark.

However, these people have been screened by the King of Portugal after all, and there is no such thing as useless. Therefore, Emperor Chongzhen decided to keep everyone.

Looking at them, Emperor Chongzhen announced his decision: these people would return to Jingshi with him, first adapt to the life of the Ming Dynasty in Jingshi Guozijian, communicate with the prisoners of Guozijian, and at the same time translate the books that came with them.

Seriously, Emperor Chongzhen is a little looking forward to the cultural collision between them and the prisoners of Guozijian, and see how much the Ming people of this era can learn from them?

After finishing this, Emperor Chongzhen drove back to Beijing. Chongzhen's twenty years have passed like this, and I don't know if I can spend this year in Beijing.

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