Expert

Ok, so we all know the definition of an expert.  

"X" is an unknown quantity and  "spert" is a drip under pressure. 

Ive just learned the derivation of "x". I can't believe it, I've had a serious interest in numbersfor much of my working life and now I learn this.  I'm currently reading about Omar Khayyam and his Rubaiyaat.  

It was 1072, he had not yet written the Rubaiyaat, but was fully immersed in a study of cubic equations. To represent the unknown in this treatise on algebra, Khayyam used the  Arabic term "shay" which means thing. This word, spelled 'Xay' in Spanish scientific works, was gradually replaced by its first letter, x, which became the universal symbol for the unknown. 

Not only was Omar Khayyam a man of words, he was a man of numbers. Yay!!!  

Postscript.  

Screen shot of google doodle acknowledging his birthday, and co incidentally I'm reading about him at the same time.  Well, only a month later!! 

Screen shot of google doodle acknowledging his birthday, and co incidentally I'm reading about him at the same time.  Well, only a month later!! 


Google on Saturday May 18, marked renowned Persian mathematician Omar Khayyam's 971st birth anniversary with a doodle. Khayyam was a Persian mathematician, poet, philosopher, astronomer. He has known for his work on cubic equations as well as his contribution to the parallel axiom. Omar Khayyam born on May 18, 1048 in Nishapur in north-east Iran. He is remembered for the creation of the Jalali calendar, Pascal's triangle discovery. He passed away on December 04, 1131 at the age of 83.