From Hindupedia, the Hindu Encyclopedia
By Swami Harshananda
Vimuktātman lived in A. D. 1200. Vimuktātman is one of the important advaitins of the post-Śañkara period. His famous work, the Istasiddhi, is widely acclaimed as a standard treatise. It is one of the four Siddhi-works, the other three being Advaitasiddhi, Brahmasiddhi and Naiṣkarmyasiddhi. Except that he was a disciple of Avyayātman, nothing more is known about him. He is said to have written one more work called Pramāṇa-vrtti-nirṇaya which is not yet published.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore