Brahmagupta's problem

This problem was given in India by the mathematician Brahmagupta in 628 AD in his treatise Brahma Sputa Siddhanta:

solve the Pell equation

$x^2 - 92y^2 = 1.$

Brahmagupta gave the smallest solution as

$(x,y) = (1151,120).$

See also

• Brahmagupta
• Indian mathematics
• List of Indian mathematicians
• Pell's equation
• Indeterminate equation
• Diophantine equation

External links

Weisstein, Eric W., "Brahmagupta's Problem", MathWorld.