# Definition:Pisot-Vijayaraghavan Number/Historical Note

The Pisot-Vijayaraghavan numbers were discovered by Axel Thue in $1912$.
They were rediscovered by Godfrey Harold Hardy in $1919$ within the context of Diophantine approximation.
They became more widely known after the publication of Charles Pisot's dissertation in $1938$.
Tirukkannapuram Vijayaraghavan and Raphaël Salem continued their study in the $1940$s.