Математика Викторины(Mathematics Quiz)

'X' is considered as the founder of 'Y', a credit he shares with 'Z'.The term 'Y' is derived from one of the two operations that 'X' used to solve quadratic equations.Another term 'W' stem from the Latin form of X's name.Ws are essential to the way computers process information.What are W,X,Y and Z.The picture of 'X' is shown below (hope you cannot read Russian).
Clue:X is Persian and Z is Greek.