After the last class at noon, Ye Chen found that he felt a sense of satisfaction and desire for knowledge that he had not felt for a long time

Ye Chen was about to go to the library to learn the special problem-solving methods during high school to strengthen his mastery of the knowledge provided by the system when he suddenly remembered

"Yingying saw her eat in the cafeteria a few times before she knew me, and now that her father is gone, where is she going to eat lunch now?"

After thinking of this, Ye Chen put the idea of going to the library to study behind and returned to the classroom

As soon as he returned to the classroom, Ye Chen saw a boy blocking in front of Wei Yueying's desk

"Yingying, yesterday I was supposed to help you contact the job, but Brother Biao suddenly entered the bar, I saw him sitting next to you, and asked the bartender to give you a drink, I thought he knew you, so he didn't stop you, who knew that it was wrong for you to finish drinking, I hurried to call a friend, but as soon as I came back, I found that you were not there, I looked for you for a while, fortunately you are okay now, let's go, let's go to dinner, and then go to find you a job in the evening...."

As soon as Ye Chen entered the classroom door, Wei Yueying noticed it

Wei Yueying hurriedly said to the classmate:

"No need, I.... I'm not going out with you again, my boyfriend is here, please get out of the way! ”

"What? Boyfriend? Which one? The boy turned his head and cursed

Ye Chen also saw the boy's face clearly at this time

Du Hui, the son of the deputy director of the Jianghai City Public Security Bureau, in addition to fighting, he provokes other girls on weekdays, and abandons the other party after playing with feelings

"Yingying who dared to find me, hum! I couldn't provoke him before, but now that I have my own golden finger, will I still be afraid of him? If I don't dare to do this, I'll defend myself against a hairy mechanical civilization."

Thinking of this, Ye Chen also strode towards Du Hui

"Ye Chen, you have a chance, you are a dick like you, even a goddess like Yingying is soaked, but you are not worthy! Tell you, hurry up and make it clear to Yingying, otherwise..."

"What if it doesn't?" Ye Chen replied with a smile

Du Hui was also stunned and thought

"Huh? Didn't Ye Chen, this kid run away in fright before, and now he dares to confront me? ”

Du Hui said immediately

"Otherwise, I'll find someone to beat you to death..."

Before Du Hui's words fell, he felt a sharp pain on the left side of his face, and he couldn't help but fall backwards

Du Hui knocked over three or four desks in succession, startling the other students who were chatting

"This is not Du Hui, how did he be overthrown?"

"It's overthrown, it's obviously overturned! Why is Ye Chen so manly all of a sudden?"

"Didn't you listen, Du Hui went to provoke his girlfriend, this is something that even men can't swallow."

....

When Du Hui heard the discussion of other classmates, he was ashamed and indignant, and glared at Ye Chen with eyes like looking at his father's enemy

Ye Chen!! You're done, I won't kill you in the afternoon, my surname is Du, I won't let you out of school by then! ”

"It doesn't matter, I heard that Director Du has always been clean and attaches great importance to family style, if I heard that you went to the bar yesterday..."Ye Chen said with a smile

Du Hui was also shocked

He used to fight at school, all behind his father's back, and at home he pretended to be a good baby

"No! When the time comes, let my dad know that my pocket money will be wasted this month" Du Hui covered his face that was still in pain, and thought secretly

"See you at the school gate this afternoon, if you are a man, remember not to leave"

Ye Chen smiled slightly:

"Don't worry! I'm not a "scumbag" man like you.

Du Hui glared at Ye Chen again and walked away, and before leaving the classroom, he took out his mobile phone and started making calls

"Ye Chen, how are you.... You can't make a feud with Du Hui for me, he...."

"Okay, Yingying, since you want to be my girlfriend, I will definitely not let you be looked at by others again, you can relax, I will bear what I have" Ye Chen said with a serious face

Yu Yueying's heart was like blooming at this time, unusually sweet

Before, Wei Yueying promised to be Ye Chen's girlfriend, mostly because Ye Chen saved herself, but now, Yu Yueying found that she really fell in love with Ye Chen from the bottom of her heart

Ye Chen didn't squirm, and then grabbed Wei Yueying's hand and took her to dinner

"Ye Chen, I won't go, I brought my own lunch...."Yu Yueying said hurriedly after watching Ye Chen take him to the cafeteria

"No! Don't eat the food you brought, it's cold, let's go, I'll take care of your food in the future" Ye Chen replied without looking back

Regardless of thirty-seven twenty-one, he pulled Yu Yueying and began to eat

While having lunch, Ye Chen was also thinking about how to solve the matter with Du Hui in the afternoon

"It's impossible for Du Hui to swallow this breath, maybe he will find someone else to stop me together, and I have to prepare in advance," Ye Chen thought to himself

Ye Chen secretly thought about the system in his heart, and then came to the pure white system space

"System, is there any way to quickly improve my personal strength? On the physical level, the "

"Searching for a solution to the problem for the host....

The search has been completed and the results are as follows:

1. Improve your physical fitness index

2. Unlock defensive weapons and weapons of mass destruction through technological replication

3. Off-site assistance through remote physical assistance of the system

4. Exchange related items and abilities through life essences"

The mechanical sound of the system then sounded

"Uh.... Which option should I choose in my current situation? If you want to have a quick effect, the effect should not be too exaggerated, and you must be able to single-handedly compete with the level of four or five ordinary people."

"According to the requirements of the host, the system recommends the use of essence for mental strength and muscle strength training," the system replied

"But I only have 8 life essence left, can I make any upgrades?" Ye Chen said embarrassedly

"Hosts can obtain the essence in the following ways:

1. System task rewards

2. Read books for self-improvement

3. Complete special missions (currently the host's health level is lv1, not yet unlocked)"

"Uh.... Is there a limit to reading books? Can Postpartum Care for Sows also be? ”

"The life essence obtained by the host needs to read the book is determined by the difficulty and value of the book, and the book with repeated knowledge will not be rewarded, and the value point of the host's "postpartum care of the sow" is 0.002 life essence."

After Ye Chen understood the rules, he was no longer poor-mouthed, and immediately quit the system

Back to reality, Ye Chen looked at Lady Yu Yueying's eating posture and said with a smile

"It's okay, Yingying, don't be so restrained in front of me, relax, let's go to the library later!"

"Uh-huh, okay! Ye Chen, what book do you want to read, I can recommend it."

Ye Chen suddenly realized that he didn't know what book to read

"Hey, wait, mathematics is a sacred discipline that can make human hair return to the void, what about mathematical writings.... It should be worth a lot."

"Yingying, do you know any professional math books that you can read in high school?" Ye Chen asked

Yu Yueying raised her head and thought about it, brushed a strand of hair on her cheek to her ears and temples with her hand, and recommended:

"Academician Zhang Jingzhong's "Mathematical Paradox and Three Mathematical Crises" is still very interesting, knowledgeable and not so boring at the same time, Ye Chen, you can go and see it"

"Ao Ao, that's good, Yingying, let's go" Ye Chen took Yu Yueying's hand

"Mm-hmm" Wei Yueying felt the temperature coming from her hand, lowered her head and agreed

After Ye Chen came to the library, he went directly to the math area to find the book

I found a quiet spot and sat down

Opening the scroll, Ye Chen flipped the book to the table of contents, and found that there was a blue data frame floating behind each section of the catalog, recording the reward points corresponding to different sections

Ye Chen hurriedly looked up to see if Wei Yueying had seen these data frames, and breathed a sigh of relief after finding that Wei Yueying did not react, it seems that the data provided by the system can only be seen by me

When Ye Chen was flipping through the catalog, he found that the reward points for the third chapter: The Second Math Crisis were particularly generous, reaching 25 points, and Ye Chen immediately began to flip through them

After more than 1 hour of reading, Ye Chen also had a particularly deep understanding of the second mathematical crisis

Zeno discussed the assumption that time was continuous and discontinuous, but came to the absurd conclusion that was inconsistent with everyday experience

Continuity means infinitely divisible, and it is related to infinity!

Zeno's paradox is supposed to be the initial stage of Western understanding of the concept of "infinity", and the ancient Greeks' belief in "infinity" was severely challenged, forcing them to seek geometric solutions to the difficulties encountered in algebra

Archimedes used the "exhaustion method" (a limiting method for turning a polygon into a circle) and obtained the area of a circle equal to the area of a right triangle whose circumference and diameter form a right-angled side! i.e. the area formula of the circle! But he dodged the question that pi is an irrational number

With the fall of ancient Greece and until the Renaissance, the concept of "infinity" remained a fog that could only be understood but not spoken

！ In the 17th century, the English scientist Newton and the German philosopher Leibniz invented calculus at the same time.

For example, a function y=x^2, the derivative is △y is equal to (x+△x)^2-x^2 divided by △x, this step treats the variable △x as a small enough number (not 0), calculates △y=2△x+2x, then suddenly treats △x as 0, and obtains △y=2x, which will treat △x as a very small number and 0 for a while, which is a complete contradiction, Newton and Leibniz improved the calculus operation for this purpose, but there is no result

Calculus uses incorrect logic to solve many problems that cannot be solved by conventional means, which makes mathematicians feel confused and afraid! Thus the second "mathematical crisis" appeared! After the 18th and 19th centuries, many mathematicians improved and innovated the calculus algorithm, and the second crisis was successfully solved!

Mathematics seems to be full of contradictions! Ye Chen sighed

"Tick.... The host has understood and mastered the Chapter, and has gained the Life Essence: 25 points"

Ye Chen was ecstatic in his heart

"It seems that I have found a --- math of the divine path of metamorphosis!!"