The Devotion of Suspect X (Detective Galileo, #3)

by Keigo Higashino

They shared a common desire to describe the world around them with theorems, but they approached this task from opposite directions. Ishigami built his theorems with the rigid blocks of mathematical formulas while Yukawa began everything by making observations.

devising an unsolvable problem, or solving that problem?

was like his relationship with mathematics: it was enough merely to be associated with something so sublime.