Carefree Prince In Tang Dynasty

In the legend, the authors of the legendary book "Tui Bei Tu", which has predicted a thousand years, are the veteran Yuan Tiangang and Li Chunfeng. The day when Yuan Tiangang personally selected Li Xin to marry him shows that Li Shimin attaches great importance to Li Xin.

In order to show the importance of Li Shimin's order and the respect for Li Xin at the same time, Yuan Tiangang personally brought three kits to the palace of Chu Wang and handed them to Li Xin. Each kit contains an auspicious day for marriage.

Although Li Xin didn't believe in these godly talks, it didn't mean that he didn't want to win favors for his future marriage with Chen Youlan. Therefore, he also respected Yuan Tiangang, personally met him, made tea, and had a long conversation with him.

Li Xin discovered that although Yuan Tiangang is a Taoist priest, he is by no means a sacred stick. His behavior and demeanor have a free and easy temperament, and he is easy to draw from the scriptures while talking, and he has quite insights in the calculation.

Speaking of math, Yuan Tiangang suddenly smiled and said, "I have long heard that His Royal Highness Chu is doing great research on mathematics. Pang Dao has always wanted to ask for advice but has no chance. If His Highness is free today, I don’t know if I am willing to give pointers to Pang Dao. One or two?"

"Mr. Yuan is serious." Li Xin said hastily, "It's a great study, it's broad and profound, and the kid is just a first glimpse of the way. If you are not ashamed of advice, it is better to discuss it together."

Perhaps because of the study of the relationship between the astronomical calendar and the movement of stars, Yuan Tiangang is obviously interested in geometry and quite accomplished. However, his calculation method is biased towards Euclid's traditional geometric method, which is a test of ingenuity and brain power.

If you have to say it, it feels a bit like Olympiad. Many problems can only be obtained by cleverly deforming and patching.

All in all, Li Xin is not used to this way of thinking. One is that he has been out of elementary school arcane for too long, and the other is that he has already mastered a more general method of analytic geometry, and now he is asked to abandon analytic geometry and switch to a lower-dimensional purely geometric way of thinking. , It's very difficult.

When he and Yuan Tiangang wrote and painted on paper, they were thinking about where to set the origin, and the problem was solved, so it seemed stupid on the surface, and it was basically Yuan Tiangang talking about it.

In fact, Yuan Tiangang also deliberately tested Li Xin. As a close minister of the emperor, he had long heard that Li Xin knew a lot of weird knowledge, and he was involved in arithmetic and strange sects. Since I met it today, it is inevitable that I will feel a little tempting. If Li Xin's performance is indeed excellent, he really has a few difficult questions to ask for advice.

However, it seems that Li Xin's performance is somewhat unsatisfactory. Li Xin only came up with one or two questions raised by Yuan Tiangang, and most of them were writing and painting and couldn't solve them.

It seems...under the prestige, it's actually difficult.

Yuan Tiangang thought with some regret.

At this time, Li Xin put down his pen and said with a wry smile: "Mr. Yuan's questions are indeed strange and very difficult." To be honest, it's not other people's dishes, but Yuan Tiangang's geometric problems that I don't know where they come from. It's complicated, and pure geometry is really inadequate.

Yuan Tiangang’s Qigong training is naturally top-notch. Although he already has some contempt in his heart, he smiled on his face and said, “It’s okay, I can study it slowly after I go back.”

Li Xin said hesitantly: "In fact, the younger generation has a completely different approach, which may solve all similar problems."

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