Basic Stochastic Processes [Brzezniak]
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Basic Stochastic Processes: A Course Through Exercises
Authors: Zdzisław Brzeźniak & Tomasz Zastawniak
Publication: 1999
Publisher: Springer-Verlag London
Series: Springer Undergraduate Mathematics Series

Basic Stochastic Processes is an introductory but mathematically rigorous course in stochastic processes, designed primarily for final-year mathematics undergraduates. Its distinctive feature is its learning-through-exercises approach: exercises are not merely supplementary but form an essential part of the exposition. Each exercise comes with an informal hint, while complete solutions appear at the end of each chapter, making the book particularly suitable for independent study. The expected background is relatively modest—standard probability theory and calculus—although some familiarity with measure-theoretic ideas and the Lebesgue integral is helpful. 

The book begins with a review of probability before developing conditional expectation, which provides much of the mathematical machinery needed later. It then introduces discrete-time martingales, filtrations, stopping times and the Optional Stopping Theorem, followed by Doob's inequalities, martingale convergence and uniform integrability. A substantial chapter is devoted to Markov chains, including classification of states and their long-term behaviour. The transition from discrete to continuous time introduces two fundamental stochastic models: the Poisson process and Brownian motion

The final chapter moves into Itô stochastic calculus, introducing the Itô stochastic integral, its properties, stochastic differentials, the Itô formula and basic stochastic differential equations. This gives the reader a genuine bridge from elementary probability to modern stochastic analysis and applications such as mathematical finance. Rather than attempting an encyclopedic treatment, Brzeźniak and Zastawniak concentrate on a carefully selected path through the central concepts. The result is particularly valuable for readers who want to do mathematics rather than simply read definitions and theorems. 

Key takeaways
  • Exercise-driven learning: hints and complete solutions make the book unusually well suited to self-study.
  • Strong progression: probability → conditional expectation → martingales → Markov chains → Brownian motion → Itô calculus.
  • Rigorous but accessible: aimed at advanced undergraduates rather than requiring graduate-level probability from the outset.
  • Excellent preparation for further study: particularly useful before more advanced work in stochastic differential equations, mathematical finance, probability theory or stochastic analysis. 


Springer — Basic Stochastic Processes
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