There are several journals and publications that provide current affairs related to the UPSC Mathematics Optional subject. These resources are valuable for UPSC aspirants who have chosen Mathematics as their optional subject and are looking for relevant and updated information to enhance their preparation. Here are some notable journals and publications that cater to this need:

1. Mathematics Today: Mathematics Today is a monthly journal that covers various aspects of mathematics. It includes articles, practice questions, and discussions on mathematical concepts and problem-solving techniques. This publication can be helpful for UPSC Mathematics Optional aspirants to stay updated with the latest developments in the field of mathematics.

2. The Mathematics Educator: The Mathematics Educator is a journal that focuses on mathematics education. It covers topics related to the teaching and learning of mathematics, pedagogical strategies, and research findings in the field. This journal can be beneficial for UPSC aspirants to gain insights into effective teaching methods and approaches to enhance their understanding of mathematical concepts.

3. The Mathematical Gazette: The Mathematical Gazette is a renowned journal that publishes articles on various branches of mathematics. It includes research papers, expository articles, and problem-solving sections. This publication can be a valuable resource for UPSC Mathematics Optional aspirants to explore different mathematical topics in depth and broaden their knowledge base.

4. The College Mathematics Journal: The College Mathematics Journal is a journal that caters to college-level mathematics education. It covers topics ranging from pure mathematics to applied mathematics and statistics. This journal can be beneficial for UPSC aspirants to gain a comprehensive understanding of various mathematical concepts and their applications.

5. The American Mathematical Monthly: The American Mathematical Monthly is a prestigious journal that publishes articles on mathematics and its applications. It covers a wide range of topics, including pure mathematics, applied mathematics, and mathematical modeling. This journal can be a valuable resource for UPSC Mathematics Optional aspirants to stay updated with the latest developments in the field and explore advanced mathematical concepts.

In conclusion, the aforementioned journals and publications provide current affairs related to the UPSC Mathematics Optional subject. These resources can be immensely helpful for UPSC aspirants to stay updated with the latest developments in the field of mathematics and enhance their understanding of various mathematical concepts and problem-solving techniques.