Proper noun
Weierstrass (plural Weierstrasses)
A surname.
19th century: Gauss, Weierstrass and Legendre The first page of Euler's paper Carl Friedrich Gauss rewrote Euler's product as : and used this formula to discover new properties of the gamma function. Source: Internet
Existence The extreme value theorem of Karl Weierstrass states that a continuous real-valued function on a compact set attains its maximum and minimum value. Source: Internet
In 1881 he left for the University of Vienna to complete his mathematics studies under the supervision of Leo Königsberger (a former student of Weierstrass). Source: Internet
In his work Weierstrass formalized the concept of limit and eliminated infinitesimals. Source: Internet
Following the work of Weierstrass, it eventually became common to base calculus on limits instead of infinitesimal quantities, though the subject is still occasionally called "infinitesimal calculus". Source: Internet
General criteria began with Kummer (1835), and have been studied by Eisenstein (1847), Weierstrass in his various contributions to the theory of functions, Dini (1867), DuBois-Reymond (1873), and many others. Source: Internet