Pell's Equation/Historical Note

Historical Note on Pell's Equation
It is popularly believed that Pell's Equation was misattributed to by, and that it was in fact  who was the first European to solve it.

However, Pell's Equation appears in Teutsche Algebra by ($1659$), which was certainly written with 's help, and possibly written entirely by.

Some sources attribute Pell's Equation to.

Pell's Equation had been extensively investigated by and subsequent mathematicians of the Indian tradition as far back as $628$ C.E.  Subsequently  in the $12$th century and  in the $14$th found solutions.