Govorov’s style of proof is exceptionally clean. Emulate his notation to improve your mathematical communication.
This book is not a standard high school textbook; it is a between high school mathematics and university-level analysis/algebra. It focuses on deep conceptual understanding rather than rote memorization. v govorov mathematics pdf
If you cannot locate an authentic Govorov PDF, these three textbooks offer a similar level of rigor and problem density: Govorov’s style of proof is exceptionally clean