Solution:
The concept of
"zero" was discovered by ancient Indian mathematicians. One of the key figures associated with this discovery is Brahmagupta, an Indian mathematician and astronomer who lived around the 7th century CE. Brahmagupta helped develop the rules for using zero as a placeholder in mathematical calculations, which was a significant advancement in the history of mathematics. So, to answer your question, it was Brahmagupta and other ancient Indian mathematicians who discovered the concept of 'zero.'