In mathematics, differential calculus is a subfield of calculus concerned with the study of the rates at which quantities change. It is one of the two traditional divisions of calculus, the other being integral calculus. The primary objects of study in differential calculus are the derivative of a function, related notions such as the differential, and their applications. The derivative of a function at a chosen input value describes the rate of change of the function near that input value. The process of finding a derivative is called differentiation. Geometrically, the derivative at a point is...

Hebrew (/ˈhiːbruː/; עברית ʿIvrit [ʔivˈʁit] ( ) or [ʕivˈɾit] ( )) is a West Semitic language of the Afroasiatic language family. Historically, it is regarded as the language of the Hebrew Israelites and their ancestors, although the language was not referred to by the name Hebrew in the Tanakh. The earliest examples of written Paleo-Hebrew date from the 10th century BCE, in the form of primitive drawings, although "the question of the language used in this inscription remained unanswered, making it impossible to prove whether it was in fact Hebrew or another local language". Hebrew had ceased to...