- "Introduction to the Theory of Computation" by Michael Sipser: This book provides a comprehensive introduction to the mathematical concepts and theories behind computer science. It covers topics such as automata theory, formal languages, computability, and complexity theory.
- "Algorithms" by Robert Sedgewick and Kevin Wayne: This book focuses on algorithms and data structures, providing a solid foundation in the practical aspects of computer science. It covers a wide range of algorithms and their analysis.
- "Discrete Mathematics and its Applications" by Kenneth H. Rosen: This book covers the fundamental concepts of discrete mathematics, which are essential for computer science. It includes topics such as logic, set theory, combinatorics, graph theory, and probability.


- EduRev: EduRev offers a wide range of study materials, including video lectures, notes, and practice questions, specifically designed for UPSC Mathematics Optional subject exam. It covers various topics of mathematical computer science and provides comprehensive coverage of the syllabus.
- NPTEL: NPTEL offers free online courses on computer science and mathematics. The courses are taught by renowned professors and cover topics such as automata theory, algorithms, and discrete mathematics.
- GeeksforGeeks: GeeksforGeeks is a popular website that provides articles, tutorials, and practice problems related to computer science. It covers a wide range of topics and offers explanations and examples for better understanding.


- Solving previous year question papers gives you a good understanding of the exam pattern and helps you identify the important topics. It also helps in practicing time management and improves problem-solving skills.
- UPSC Mathematics Optional subject exam question papers can be found on the official UPSC website or various other online platforms.


- Joining a reputed coaching institute can be beneficial as they provide structured guidance and expert faculty who can help clarify doubts and provide additional study materials.
- However, it is important to thoroughly research and choose a coaching institute that has a good track record and positive reviews.

Remember, while studying for the mathematical computer science section of the UPSC Mathematics Optional subject exam, it is important to focus on understanding the concepts and their applications. Regular practice, revision, and self-assessment are key to achieving success in the examination.