now be counted as complete and rigorous. Not enough was known about some of the technical issues: the geometers worked by a mixture of inspired guesswork and close familiarity with examples. Oscar Zariski started to work in the 1930s on a more refined theory of birational mappings, incorporating commutative algebra methods. He also began work on the question of the classification for characteristic p, where new phenomena arise. The schools of Kunihiko Kodaira and Igor Shafarevich had put Enriques' work on a sound footing by about 1960. Works Enriques F. Lezioni di geometria descrittiva. Bologna, 1920. Enriques F. Lezioni di geometria proiettiva. Italian ed. 1898 and German ed. 1903. Enriques F. & Chisini, O. Lezioni sulla teoria geometrica delle equazioni e delle funzioni algebriche. Bologna, 1915-1934. Volume 1, Volume 2, Vol. 3, 1924; Vol. 4, 1934. Severi F. Lezioni di geometria algebrica : geometria sopra una curva, superficie di Riemann-integrali abeliani. Italian ed. 1908. Enriques F. Problems of Science (trans. Problemi di Scienza). Chicago, 1914. Enriques F. Zur Geschichte der Logik. Leipzig, 1927. Castelnouvo G., Enriques F. Die algebraischen Flaechen// Encyklopädie der mathematischen Wissenschaften, III C 6 Enriques F. Le superficie algebriche. Bologna, 1949. Articles On Scientia. ed evoluzione numeri e l'infinito pragmatismo principio di ragion sufficiente nel pensiero greco problema della realtà significato della critica dei principii nello sviluppo delle matematiche della storia del pensiero scientifico nella cultura nazionale dans la pensee des grecs nella storia del pensiero mathematique de Klein connaissance historique et la connaissance scientifique dans la critique de Enrico De Michelis filosofia positiva e la classificazione delle scienze motivi della filosofia di Eugenio Rignano References External links Reviews of the works of Federigo Enriques, MacTutor History PRISTEM page (Italian language) Official home page of center for Enriques studies (Italian language) 1871 births 1946 deaths Livornese Jews Academic staff of the Sapienza University of Rome 20th-century Italian mathematicians Italian people of Portuguese descent 20th-century Italian philosophers Algebraic geometers Italian algebraic geometers Italian historians of mathematics Members of the Lincean Academy 19th-century Italian Jews 20th-century Italian Jews