"What's wrong?" Dewitt noticed that Song He was acting strangely.
"I didn't understand it." Song He wore a complicated expression. "It feels... twelve out of ten wrong!"
"Isn't this your theory?" Dewitt pointed at the big screen.
"He said it was my theory, but what he explained isn't the same as my theory..." Song He hesitated. "Did Rudolph make a mistake?"
Dewitt seemed to have prepared for this. He immediately pulled a microphone from the side. "Rudolph, wait a moment!"
Rudolph, who was enthusiastically preparing to explain the third part onstage, paused and turned around blankly.
Song He took the microphone from Dewitt and stood up.
"I have a few minor questions. Regarding the section from Equation 2-3 to Equation 2-6, when you use the Song He sphere, logically speaking, it can't be applied within this range. It can only be applied within the range of well-defined Song He manifolds. So how did you complete these steps?"
Rudolph froze. After a long while, he said nothing, merely staring blankly at the big screen.
After a long silence, the mathematicians throughout the venue began exchanging glances. Everyone sensed that something was wrong.
"Oh!" Rudolph slapped his forehead as if he had remembered something. "You mean that problem? See Equation 11-2 in the proof of the Song He Manifold!"
"I remember Equation 11-2, but the problem is that Equation 10-6, earlier in the proof of the Song He Manifold, already restricted the range. You can't use it like that outside the range," Song He said.
"Can't use it?" Rudolph asked in horror.
"You didn't notice?" Song He asked in surprise.
"I... huh?" Rudolph was at a loss. "Wait, are you serious? Why can't it be used outside the range?"
"Take this as an example. Multiplying a negative number by a negative number