Bhaskara II was an Indian astronomer and mathematician in the 12th century. He developed many of the similar foundations and results which were attributed fully to Europeans and are extremely useful in predictions and science today, such as a rough form of calculus. Bhaskara II was raised by Bhaskara I, who was also a mathematician and became the head of astronomical observation at Ujjain, the most prestigious mathematical center in India at the time. This position certainly helped Bhaskara have a platform for his work to be acknowledged within India, including a description of the positives and negatives more comprehensive than that given by earlier mathematicians, for instance the existance of both positive and negative solutions to square roots. However, this prestigious position did not give him international respect, as he also developed an early understanding of calculus to use to describe celestrial motion long before either Newton or Leibnitz were born, but is usually unaccredited. His insights were further developed by other mathematicians at Ujjain after his death and his son made a school devoted to teaching his work.

Sources:

https://www.britannica.com/biography/Bhaskara-II

http://www.famousmathematicians.com/bhaskara-ii/