For 25 years, we’ve thrilled at the work of Ragamala Dance Company, as founder Ranee Ramaswamy and then her daughters Aparna and Ashwini have expanded Bharatanatyam’s traditional boundaries, its potential for interdisciplinary collaboration on an epic scale, and our understanding of the form’s deep historical resonance and contemporary relevance. Alarmél Valli is their teacher. In this celebratory return performance, Valli will discuss the 2,000-year-old dance form’s timeless relevance and her approach and perspective on Bharatanatyam. Valli will also give a revelatory and breathtaking solo performance. The artist talk is at 7 p.m. Thursday, and the solo performance is at 7:30 p.m. Saturday.