Thinking in Problems: How Mathematicians Find Creative Solutions by (2013) is a rigorous problem book designed to immerse readers in the "atmosphere of real mathematical work". Unlike standard textbooks, it focuses on the active discovery of concepts through structured problem sequences. 📖 Book Overview Author: Alexander A. Roytvarf Structure: 12 chapters covering 193 non-routine problems.

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Built on Polya’s "Arbeitsprinzip" (active learning), where the learner discovers material through solving problems.