Scientific research in the country is supported partly by industry and partly by the state, through the network of Hungarian universities and by scientific state-institutions such as Hungarian Academy of Sciences. Hungary has been the home of some of the most prominent researchers in various scientific disciplines, notably physics, mathematics, chemistry and engineering. As of 2018, twelve Hungarian scientists have been recipients of a Nobel Prize. Until 2012 three individuals: Csoma, János Bolyai and Tihanyi were included in the UNESCO Memory of the world register as well as the collective contributions: Tabula Hungariae and Bibliotheca Corviniana. Contemporary, internationally well-known Hungarian scientists include mathematician László Lovász, physicist Albert-László Barabási, physicist Ferenc Krausz, and biochemist Árpád Pusztai. Hungary is famous for its excellent mathematics education which has trained numerous outstanding scientists. Famous Hungarian mathematicians include father Farkas Bolyai and son János Bolyai, who was one of the founders of non-Euclidean geometry; Paul Erdős, famed for publishing in over forty languages and whose Erdős numbers are still tracked, and John von Neumann, a key contributor in the fields of quantum mechanics and game theory, a pioneer of digital computing, and the chief mathematician in the Manhattan Project. Notable Hungarian inventions include the lead dioxide match (János Irinyi), a type of carburetor (Donát Bánki, János Csonka), the electric (AC) train engine and generator (Kálmán Kandó), holography (Dennis Gabor), the Kalman filter (Rudolf E. Kálmán), and Rubik's Cube (Ernő Rubik).