433:
31:
604:
612:
517:
528:Țițeica wrote about 400 articles, of which 96 are scientific projects, most addressing problems of differential geometry. His bibliography includes over 200 published papers and books, which appeared in many editions. Carrying on the researches of the American geometer of German origin
303:. His name was registered as Țițeica–a combination of his parents' surnames. He showed an early interest in science, as well as music and literature. Țițeica was an accomplished violinist, having studied music since childhood: music was to remain his hobby. While studying at the
465:
429:, of the Romanian Association of Science, and of the Association of the development and the spreading of science. He was a vice-president of the Polytechnics Association of Romania and member of the High Council of Public Teaching.
1492:
425:, replacing Spiru Haret. Later he was appointed in leading roles: in 1922, vice-president of the scientific section, in 1928, vice-president and in 1929 secretary general. Țițeica was also president of the
623:(1908–1985) — all of whom pursued careers in academia; the youngest one became a renowned quantum physicist. The family lived in a 19th-century house on Dionisie Lupu Street, close to Lahovari Plaza, in
701:
311:, he contributed to the school's magazine, writing the columns on mathematics and studies of literary critique. After graduation in 1892, he obtained a scholarship at the preparatory school in
338:
In the summer of 1896, after a stint as a substitute teacher at the
Bucharest theological seminary, Țițeica passed his exams for promotion to a secondary school position, becoming teacher in
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58:
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1432:
1427:
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1422:
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437:
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120:
591:
in 1908. The problem was posed independently by Roger Arthur
Johnson in 1916, and the resulting configuration is also referred to as the
1472:
1366:
1274:
659:
418:
188:
1251:
536:
and a new class of curves which now carry his name. His contributions represent the beginning of a new chapter in mathematics, namely,
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417:. He was promoted to full professor on 3 May 1903, retaining this position until his death in 1939. He also taught mathematics at the
1180:
1502:
1437:
533:
1447:
619:Țițeica married Florence Thierin (1882–1965) and the couple had three children — Radu (1905–1987), Gabriela (1907–1987), and
494:
320:
1074:
804:
761:
426:
1452:
1191:
537:
354:
631:
was affixed to the house by the city administration in 1998. He died in 1939 in
Bucharest and was buried in the city's
1457:
541:
382:
405:, he defended it on 30 June 1899 before a board of examiners consisting of Darboux (as chair), Goursat, and Koenigs.
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304:
563:
He is also known for a result on the geometry of circles and triangles in the plane, referred to as Țițeica's
414:
332:
316:
184:
112:
620:
157:
485:. In 1926, 1930, and 1937 he gave a series of lectures as titular professor at the Faculty of Sciences in
345:
In 1897, on the advice of teachers and friends, Țițeica completed his studies at a preparatory school in
639:
564:
464:(1936). With 5 invited ICM talks (1908, 1912, 1924, 1932, and 1936), he is in a tie for 7th place among
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276:
130:
54:
666:
576:
549:
30:
1417:
1412:
1039:
987:
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624:
482:
366:
947:
486:
358:
116:
1442:
951:
829:
786:
643:
553:
136:
80:
658:
offers an annual "Gheorghe Țițeica Prize" for achievements in mathematics. The logo of the 40th
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252:
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821:
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1132:
1010:
842:
724:
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91:
677:#1415); he also figures on a 2 lei stamp from 1945 commemorating the founding of
357:. After ranking first in his class and earning a second undergraduate degree from the
1406:
833:
790:
627:
of
Bucharest; Țițeica moved there around 1913, when he was elected to the academy. A
545:
397:. Țițeica chose Darboux to be his thesis advisor; after working for two years on his
394:
268:
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521:
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902:
867:
324:
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Upon his return to
Romania, Țițeica was appointed assistant professor at the
1336:
501:
398:
312:
228:
102:
76:
872:, Mémorial des sciences mathématiques (in French), vol. 47, 61 pages,
662:, held in Bucharest in 1999, was inspired by Țițeica's 5 lei coin problem.
588:
457:
441:
421:, starting in 1928. In 1913, at age 40, Țițeica was elected as a permanent
339:
315:, where he also was admitted as a student in the Mathematics Department of
1381:
472:
272:
697:"Sur les congruences cycliques et sur les systèmes triplement conjugués"
817:
774:
715:
696:
647:
453:
308:
292:
265:
1114:"Gheorghe Tzitzeica – Romanian scientist of international recognition"
1088:"Gheorghe Țițeica, geometru român cu faimă internațională (1873–1939)"
403:
Sur les congruences cycliques et sur les systèmes triplement conjugués
202:
Sur les congruences cycliques et sur les systèmes triplement conjugués
201:
195:
799:
756:
516:
295:, the son of Anca (née Ciolănescu) and Radu Țiței, originally from
983:"Gheorghe Țițeica and the origins of affine differential geometry"
610:
602:
515:
431:
346:
869:
Introduction à la géométrie différentielle projective des courbes
1318:
461:
471:
He was elected correspondent of the
Association of Sciences of
732:
Tzitzéica, G. (1907). "Sur une nouvelle classes de surfaces".
275:. He is recognized as the founder of the Romanian school of
977:
Agnew, Alfonso F.; Bobe, Alexandru; Boskoff, Wladimir G.;
1493:
Academic staff of the
Politehnica University of Bucharest
1086:
Băbălîc, Nicoleta-Corina; Cârstea, Adrian-Ștefan (2015),
448:Țițeica was the president of the geometry section at the
800:"Sur une nouvelle classes de surfaces (Deuxième Partie)"
560:
and Roger Dodd (the Tzitzéica–Bullough–Dodd equation).
1300:
843:"La géométrie différentielle projective des réseaux"
319:'s Faculty of Sciences. His teachers there included
1035:"Barbilian spaces: the history of a geometric idea"
702:
224:
212:
194:
180:
170:
152:
144:
126:
108:
98:
87:
65:
40:
21:
1181:"Gheorghe Țițeica – The Man and the Mathematician"
256:; 4 October 1873 – 5 February 1939) publishing as
1148:"Gheorghe Tzitzeica – an incomplete bibliography"
1155:Balkan Journal of Geometry and Its Applications
1121:Balkan Journal of Geometry and Its Applications
903:"Gheorghe Țițeica: Strămoșii, viața și urmașii"
847:Revue générale des sciences pures et appliquées
466:mathematicians with the most invited ICM talks
1488:Academic staff of the University of Bucharest
1112:Nicolescu, Floarea; Nicolescu, Liviu (2005).
8:
1215:"Gheorghe Țițeica: Om de știință și pedagog"
1146:Pripoae, Gabriel Teodor; Gogu, Radu (2005).
805:Rendiconti del Circolo Matematico di Palermo
762:Rendiconti del Circolo Matematico di Palermo
574:, a problem he proposed (and solved) at the
552:. He investigated what is now known as the
1273:Zarojanu, Tudor Călin (January 15, 2021).
1024:
1022:
1020:
327:, Constantin Gogu, Dimitrie Petrescu, and
18:
1052:
1000:
735:Comptes rendus de l'Académie des Sciences
714:
1245:
1243:
450:International Congress of Mathematicians
1483:Titular members of the Romanian Academy
972:
970:
957:MacTutor History of Mathematics Archive
896:
894:
890:
650:bear his name, and so does a street in
1319:"Școala Gimnazială "Gheorghe Țițeica""
1301:"Colegiul Național "Gheorghe Țițeica""
1252:"Matematicianul și câinele din balcon"
757:"Sur une nouvelle classes de surfaces"
941:
939:
937:
935:
933:
931:
251:
7:
1433:20th-century Romanian mathematicians
1428:19th-century Romanian mathematicians
1066:
1064:
532:, Țițeica discovered a new class of
489:. He also gave many lectures at the
331:. In June 1895, he graduated with a
271:who made important contributions in
35:Gheorghe Țițeica on a Romanian stamp
1367:International Mathematical Olympiad
660:International Mathematical Olympiad
556:, which was further generalized by
419:Polytechnic University of Bucharest
189:Politehnica University of Bucharest
1213:Stănescu-Stanciu, Teodora (2013).
134:Tzitzéica' centro-affine invariant
16:Romanian mathematician (1873–1939)
14:
1423:People from Drobeta-Turnu Severin
1275:"La mormântul lui Mihai Eminescu"
361:in 1897, he was admitted at the
140:Tzitzéica–Bullough–Dodd equation
29:
1478:École Normale Supérieure alumni
1463:Carol I National College alumni
1468:University of Bucharest alumni
423:member of the Romanian Academy
253:[ˈɡe̯orɡet͡siˈt͡sejka]
1:
1075:Mathematics Genealogy Project
427:Romanian Mathematical Society
365:, where he took classes with
1192:Romanian Academy of Sciences
538:affine differential geometry
1337:"Premiile Academiei Române"
695:Tzitzéica, Georges (1899).
500:His Ph.D. students include
491:Free University of Brussels
1519:
1473:University of Paris alumni
1382:"The logo of the 40th IMO"
1498:Burials at Bellu Cemetery
238:
163:
28:
1054:10.1016/j.hm.2006.06.001
1002:10.1016/j.hm.2008.09.001
962:University of St Andrews
363:École Normale Supérieure
121:École Normale Supérieure
1503:Romanian schoolteachers
599:Private life and legacy
548:space, defined through
415:University of Bucharest
349:. Among his mates were
333:Bachelor of Mathematics
317:University of Bucharest
249:Romanian pronunciation:
185:University of Bucharest
113:University of Bucharest
1438:Differential geometers
1323:www.gheorghetiteica.ro
1029:Boskoff, Wladimir G.;
901:Rizea, Marian (2013).
866:Tzitzéica, G. (1931),
841:Tzitzéica, G. (1920).
798:Tzitzéica, G. (1909).
755:Tzitzéica, G. (1908).
616:
608:
525:
445:
1448:Science communicators
640:Drobeta-Turnu Severin
614:
606:
519:
435:
401:dissertation, titled
277:differential geometry
131:Differential geometry
55:Drobeta-Turnu Severin
1363:www.imo-official.org
1222:Studii și comunicări
1040:Historia Mathematica
988:Historia Mathematica
948:Robertson, Edmund F.
910:Studii și comunicări
673:stamp in his honor (
629:commemorative plaque
615:Commemorative plaque
483:University of Warsaw
478:doctor honoris causa
444:in 1932 (with a hat)
1453:Romanian scientists
946:O'Connor, John J.;
669:issued a 1.55
305:Carol I High School
117:University of Paris
1458:Romanian inventors
1095:Curierul de Fizică
1031:Suceavă, Bogdan D.
979:Suceavă, Bogdan D.
952:"Gheorghe Țițeica"
818:10.1007/BF03018218
775:10.1007/BF03029121
716:10.24033/asens.465
654:of Bucharest. The
617:
609:
565:5 lei coin problem
554:Tzitzeica equation
540:. He also studied
526:
495:University of Rome
446:
137:Tzitzeica equation
81:Kingdom of Romania
1250:Bădița, Dumitru.
679:Gazeta Matematică
638:A high school in
607:The Țițeica house
577:Gazeta Matematică
550:Laplace equations
530:Ernest Wilczynski
262:Georges Tzitzéica
242:
241:
225:Doctoral students
165:Scientific career
1510:
1397:
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1392:
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1345:Romanian Academy
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1103:
1102:
1092:
1083:
1077:
1071:Gheorghe Țițeica
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1058:
1056:
1026:
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1014:
1004:
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751:
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718:
656:Romanian Academy
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573:
255:
250:
245:Gheorghe Țițeica
214:Doctoral advisor
208:
156:Radu, Gabriela,
148:Florence Thierin
72:
50:
48:
33:
23:Gheorghe Țițeica
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1374:
1359:"40th IMO 1999"
1357:
1356:
1352:
1343:(in Romanian).
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1282:
1272:
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1248:
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1231:
1229:
1224:(in Romanian).
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912:(in Romanian).
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731:
694:
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601:
593:Johnson circles
579:
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514:
512:Scientific work
493:(1926) and the
436:Țițeica at the
411:
383:Gabriel Koenigs
379:Charles Hermite
375:Édouard Goursat
287:He was born in
285:
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109:Alma mater
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69:5 February 1939
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1307:(in Romanian).
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1104:
1078:
1060:
1047:(2): 221–224.
1016:
995:(2): 161–170.
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863:
838:
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633:Bellu Cemetery
600:
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558:Robin Bullough
513:
510:
506:Grigore Moisil
410:
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391:Henri Poincaré
371:Gaston Darboux
351:Henri Lebesgue
329:Iacob Lahovary
321:David Emmanuel
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73:(aged 65)
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51:4 October 1873
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849:(in French).
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742:: 1257–1259.
741:
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1391:December 29,
1389:. Retrieved
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1331:
1322:
1313:
1304:
1295:
1283:. Retrieved
1278:
1268:
1258:December 29,
1256:. Retrieved
1232:December 29,
1230:. Retrieved
1225:
1221:
1208:
1198:December 29,
1196:. Retrieved
1187:
1175:
1161:(1): 32–56.
1158:
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1141:
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992:
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920:December 29,
918:. Retrieved
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689:Publications
678:
667:Poșta Română
664:
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1413:1873 births
1386:www.imar.ro
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1188:www.aosr.ro
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769:: 180–187.
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355:Paul Montel
325:Spiru Haret
175:Mathematics
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885:References
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859:47.0696.02
826:40.0668.04
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1443:Geometers
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