he said to himself: “it’s a duty” and copied them into his book to solve them at home
When he tried, he found them to be very difficult…
But he kept trying and trying and going to the library, bringing references and researching until he could barely solve just one problem.
And in the lecture that followed, he noticed that the doctor hadn’t asked any questions about the assignment!
Then the student stood up and asked him:
“Doctor, why didn’t you ask about the assignment from the previous lecture?
The doctor said: “Duty?…
It was not a duty.
On the contrary, I gave you examples of mathematical problems that science and scientists have not been able to solve!
The student was amazed and said, “But I solved one of them in four papers!”
The solution to the problem was registered at Columbia University and was known by its name.
This issue with its four papers is still presented at the university to this day
This student solved the problem for a reason…because he didn’t hear the professor say, “No one could figure out his solution.”
He convinced himself that it needed to be solved… When he tried to distance himself from the effects of frustration, he solved it
Don’t listen to people who tell you you can’t
English 
French