Hey? What is that? "The guests didn't quite understand.

There are only a few people here who can understand Professor Sheng's speech.

"This young man, in mathematical language, is describing the vibrational model of the Tears of the Rose."

"The wave equation is a partial differential equation used to describe the phenomenon of waves, first used to describe light waves and electromagnetic waves, and later also applied to sound waves and all other waves, and now the wave equation is also widely used in the field of music."

Professor Sheng patiently explained, "The one-dimensional wave equation is the description equation of stringed instruments, why, because strings are one-dimensional, and they are easy to describe. We've been doing research on this lately, and it's relatively easy to transcribe string music. ”

“……”

Everyone looked at each other.

"I don't understand."

"I don't understand it at all."

", who can understand this?"

……

Professor Sheng didn't care if they understood it or not, anyway, he understood and was very excited.

The mathematical formula that Yicheng uses to describe the change in the C value is the real essence.

"The one-dimensional wave equation is actually a line fluctuation, if it is a percussion instrument, such as a drum kit, a gong, etc., when they fluctuate due to impact, the wave formed is a surface, that is, a two-dimensional wave equation."

Professor Sheng pushed the glasses off his face.

The lenses reflect two bright rays of light.

"But the two-dimensional wave equation is much more complicated, and this blackboard may not be able to write it."

"Wow, I don't understand it, but it feels so powerful." A spectator sighed.

"a chicken, do you have to know math to listen to music?!"

"Damn, I forgot what I was doing here, are we here for math class?"

“emm…… It was as if we were here to have a barbecue and enjoy the music. ”

"And good wine and beautiful ......"

"Handsome guys and beach ......"

"But...... Why are you abusing us like this?! ”

"Ah, it hurts, I think of my math teacher."

……

Yi Cheng finished the math and turned back.

The audience took a step back in fear.

"Can you write me a melody? Just a few notes. Yi Cheng handed the chalk to Sheng Yunxi, "By the way, remember to write a simple notation, I can't read the staves." ”

So this person is coming for real?

Why are you doing here if you can't even read staves?

Really do math problems?

The surrounding audience was confused.

Although Professor Sheng had just explained that he was describing the vibration model of the violin in mathematical language, they still did not understand what that meant.

"Huh? Oh good. ”

Sheng Yunxi thought about it and wrote a small piece of music on the blackboard-

（6-076-56|……

(I'm sorry, I can't type the staves, and I can't even type the legamen of the simple notation, so let's take a look.) ）

Some people who know music look at the sheet music and hum.

After a short hum, everyone else understood.

"Hey, why does that sound so like...... I'm the most beautiful in ten miles and eight wildernesses? ”

"It's obviously cool, okay."

"Oh, yes, cool, cool."

"It's not an auspicious word."

"This song reminds me of the fact that I landed in a box today."

……

It's cool, that's right.

But here's only the first prelude.

That is, it is getting cooler at night, and the flowers have not yet begun to fall into frost.

"So what's this for?" Passers-by looked at Yi Cheng in bewilderment.

Professor Sheng was very interested in this young man, and stood beside him with his hands folded and silently observed Yi Cheng.

Yi Cheng looked at it, holding the chalk and writing a string of equations on the blackboard.

He was calculating at a rapid pace, and he didn't know what he was calculating.

Everyone looked at Professor Sheng, expecting his answer.

But the professor was also confused.

After a while, Professor Sheng finally understood.

"So that's it, uh-huh, it's so beautiful!"

He let out an exclamation, and there was endless sigh in his words.

The professor straightened up and pushed his glasses with his hand.

The crowd looked at him with eager eyes.

"When I was younger, I was studying at Princeton University, and once my math tutor asked us, 'How do you spend your weekends?'"

The people around looked at the middle-aged man with strange eyes.

Why did you suddenly tell the story?

"That's right," Sheng Yunxi took his hand and quickly explained, "My dad is a person who only understands mathematics, so when he talks about mathematics, he will inevitably talk about it. ”

"Princeton...... That's where mathematicians gather? "Finally there is someone who knows the goods.

"John Nash, the Nobel laureate in economics, is a professor at Princeton University."

"Princeton University's mathematics department is ranked first in the world." Yan Ziqi was a little crying and laughing, and explained to them.

"Wow!"

People finally realized what a terrible existence it was.

Speaking of which, no one has ever introduced Professor Sheng to what he does.

They thought he was just a middle-aged teacher who knew math.

"Don't interrupt and let the teacher continue."

Some people have unconsciously called Professor Sheng a teacher, not because he knows Professor Sheng's identity as a university lecturer, but because he remembers the fear of being dominated by a blackboard in high school......

"That's right." Professor Sheng smiled and said, "When our tutor asked how we spent the weekend, I was one of the three Chinese students in our class.

We are all poor students. Moreover, the education and cultural inheritance received by the Chinese people in their bones are pragmatic and diligent.

So we also studied hard in the library for a few weekends.

You think, where did the Chinese students of our time know what kind of field trips, going out to parties, playing or something, each one is harder than the other. ”

Everyone nodded, feeling the same thing.

Then our instructor shook his head and sighed, and said, "You can't do this, you should go to the opera house to see the opera, go to the concert hall to listen to the concert, and it is better to learn one or two instruments by yourself, such as violin, piano...... Why? ”

Professor Sheng recalled this history, and a smile on his lips, "The tutor said that if you want to learn mathematics well, you must know how to appreciate music. As long as you enjoy music well, the study of mathematics will make great progress. Because mathematics and music are aesthetically identical. There is something with perfect laws and structure in terms of their intrinsic nature. ”

When Sheng Yunxi heard this, she remembered the sacred feeling when her father told her about this when she was a child...... I couldn't help but smile.

She looked sideways at Professor Sheng.

Maybe it's because of such a father that she likes music, right?

The crowd understood a rough idea.

"Math and music are figured out, so what?"

Professor Sheng smiled slightly and looked at Yi Cheng with appreciation, "This kid is writing music scores with mathematical formulas. ”

After he finished speaking, the audience fell silent.

A few seconds passed.

"Huh?!"

A wave of astonishment erupted all around.

The goddess descends to the dreamland