The Brownian Motion

The textbook offers a clear and intuitive introduction to the foundational concepts of modern financial theory, specifically designed for Business and Economics Ph.D. students. It covers essential topics such as Brownian motion, random processes, measures, and Lebesgue integrals, making complex ideas accessible to those with minimal prior knowledge. Additionally, it provides mathematical definitions and explores the historical context behind key terms, enriching the reader's understanding of the theories presented.