Finding subject-specific webinars or online workshops for UPSC Mathematics Optional subject can be a great way to enhance your understanding and preparation for the exam. Here are some steps you can follow to find such resources:

1. Search for Online Platforms: Start by searching for online platforms that offer webinars or workshops specifically for UPSC Mathematics Optional subject. One such platform is EduRev, which provides a wide range of educational resources, including webinars and workshops.

2. Explore Journals and Publications: Look for journals and publications that focus on mathematics or UPSC preparation. These publications often feature articles and advertisements about upcoming webinars and workshops. Some popular publications include Mathematics Today, Pratiyogita Darpan, and Chronicle.

3. Check University Websites: Many renowned universities and institutes offer online courses and workshops on various subjects, including mathematics. Visit the websites of universities known for their mathematics departments, such as the Indian Statistical Institute (ISI), Indian Institute of Technology (IIT), and Indian Institute of Science (IISc), to find information about any upcoming webinars or workshops.

4. Join UPSC Preparation Forums: Participate in online forums and groups dedicated to UPSC preparation. These forums often have members who share information about upcoming webinars and workshops. You can also ask for recommendations and suggestions from fellow aspirants who have already attended such events.

5. Follow Social Media Platforms: Follow social media accounts of education platforms, coaching institutes, and UPSC mentors who specialize in mathematics optional subject. These accounts often share updates about upcoming webinars and workshops. Platforms like EduRev have their own social media channels where they regularly announce such events.

6. Utilize Online Learning Platforms: Explore online learning platforms like Coursera, Udemy, and Unacademy. These platforms offer a wide range of courses, including mathematics, and often conduct webinars and workshops as part of their curriculum.

By following these steps and utilizing the resources mentioned, you can easily find subject-specific webinars or online workshops for UPSC Mathematics Optional subject. Remember to stay updated with the latest information and make the most of these opportunities to enhance your preparation.