A moment later, Qiao Yu put down his phone and asked Lan Jie next to him, "Teacher Lan, do you know the forum Little Treehouse of Algebraic Number Theory?"
Lan Jie took his eyes off his phone, looked at Qiao Yu, shook his head in confusion, and replied, "Never heard of it. Although I majored in mathematics for both my bachelor's and master's, number theory wasn't my focus. Just hearing the name, it sounds very specialized, so it's normal not to have heard of it."
"Oh. Well, you must know about the Diophantine equation, right?" Qiao Yu continued to ask.
Lan Jie, though a bit puzzled, patiently replied, "Even though number theory wasn't my major, I did earn a master's degree, so I'm definitely familiar with the basics. Why are you suddenly asking about this?"
"What level would someone be at if they found an integer solution to a certain Diophantine equation?" Qiao Yu continued.
