What is "akalanka"

Akalanka (also Akalank Deva and Bhatta Akalank) was a famous Jain logician whose works are seen as landmarks in Indian logic. He lived from 720-780 A.D. and belonged to the Digambara sect of Jainism. His work Astasati, a commentary on Aptamimamsa of Acharya Samantabhadra deals mainly with jaina logic. He was a contemporary of Rashtrakuta king Krishna I. He is the author of Tattvārtharājavārtika, a commentary on major Jain text Tattvartha Sutra. He greatly contributed to the development of the philosophy of Anekantavada and is therefore called the "Master of Jain logic".