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Lier à l'aperception d'autrui. Lier Harvard et la Canso. Jeu. College literary societies (liste des ancêtres du réseau des fraternities universitaires US) College literary societies in American higher education were a distinctive kind of social organization, distinct from literary societies generally, and they were often the precursors of college fraternities and sororities.[1] In the period from the late eighteenth century to the Civil War, collegiate literary societies were an important part of campus social life.

College literary societies are often called Latin literary societies because they typically had compound Latinate names. Since these organizations are virtually the oldest kind of student organization in America, where they have survived, they are seen as ancient institutions. One author from Georgia acknowledged that fact (by parody) in discussing his own society: "The origin of the Washington Society dates back to the glory days of the Jurassic Period of the Mesozoic Era. It was during this time that great plant-eating dinosaurs roamed the Earth, feeding on lush growths of ferns and palm-like cycads and ennettitaleans. Diagramme de Hasse. Un article de Wikipédia, l'encyclopédie libre. En mathématiques, le diagramme de Hasse, du nom du mathématicien allemand Helmut Hasse, est une représentation visuelle d'un ordre fini.

Similaire à la représentation habituelle d’un graphe sur papier, il en facilite la compréhension. Pour dessiner un diagramme de Hasse : On représente les éléments de l’ordre par des points.Si un élément x est plus grand qu’un autre élément y selon « ≤ », on place la représentation de x plus haut que celle de y.Le fait que deux éléments sont en relation est représenté par un segment entre ces deux points.

En cas d’ordre infini, on peut néanmoins aussi utiliser le diagramme de Hasse pour représenter une restriction finie de l’ordre. Exemples de diagramme de Hasse[modifier | modifier le code] Ici, on a représenté un ensemble ordonné de 11 éléments avec trois éléments maximaux, et un minimum (qui est donc aussi un minorant de l’ensemble et sa borne inférieure). S = {a,b,c,d}[modifier | modifier le code] E. H. Moore. Eliakim Hastings Moore (January 26, 1862 – December 30, 1932) was an American mathematician. Life[edit] Moore, the son of a Methodist minister and grandson of US Congressman Eliakim H.

Moore, discovered mathematics through a summer job at the Cincinnati Observatory while in high school. He learned mathematics at Yale University, where he was a member of Skull and Bones[1]:47–8 and obtained a B.A. in 1883 and the Ph.D. in 1885 with a thesis, supervised by Hubert Anson Newton, on some work of William Kingdon Clifford and Arthur Cayley. Newton encouraged Moore to study in Germany, and thus he spent an academic year at the University of Berlin, attending lectures by Kronecker and Weierstrass. On his return to the United States, Moore taught at Yale and at Northwestern University.

Accomplishments[edit] At Chicago, Moore supervised 31 doctoral dissertations, including those of George Birkhoff, Leonard Dickson, Robert Lee Moore (no relation), and Oswald Veblen. See also[edit] Notes[edit] Garrett Birkhoff. Garrett Birkhoff (January 19, 1911 – November 22, 1996) was an American mathematician. He is best known for his work in lattice theory. The mathematician George Birkhoff (1884–1944) was his father. Life[edit] The son of the mathematician George David Birkhoff, Garrett began the Harvard University BA course in 1928 after less than seven years of prior formal education. Upon completing his Harvard BA in 1932, he went to Cambridge University in England to study mathematical physics but switched to studying abstract algebra under Philip Hall.

Birkhoff held no Ph.D., a qualification British higher education did not emphasize at that time, and did not even bother obtaining an M.A. During the 1930s, Birkhoff, along with his Harvard colleagues Marshall Stone and Saunders Mac Lane, substantially advanced American teaching and research in abstract algebra. During and after World War II, Birkhoff's interests gravitated towards what he called "engineering" mathematics. Selected books[edit] Marshall Harvey Stone. Biography[edit] Stone was the son of Harlan Fiske Stone, who was the Chief Justice of the United States in 1941–1946.

Marshall Stone’s family expected him to become a lawyer like his father, but he became enamored of mathematics while he was a Harvard University undergraduate. He completed a Harvard Ph.D. in 1926, with a thesis on differential equations that was supervised by George David Birkhoff. Between 1925 and 1937, he taught at Harvard, Yale University, and Columbia University. Stone was promoted to a full Professor at Harvard in 1937. During World War II, Stone did classified research as part of the "Office of Naval Operations" and the "Office of the Chief of Staff" of the United States Department of War. The department he joined in 1946 was in the doldrums, after having been at the turn of the 20th century arguably the best American mathematics department, thanks to the leadership of Eliakim Hastings Moore.

Accomplishments[edit] During the 1930s, Stone did much important work: Poset. Un article de Wikipédia, l'encyclopédie libre. Un poset (de l'anglais partially ordered set, en français "ensemble partiellement ordonné") formalise et généralise la notion intuitive d'ordre ou d'arrangement entre les éléments d'un ensemble. Un poset est un ensemble muni d'une relation d'ordre qui indique que pour certains couples d'éléments, l'un est plus petit que l'autre. Tous les éléments ne sont pas forcément comparés, contrairement au cas d'un ensemble muni d'un ordre total. Si l'ensemble est fini, on dispose d'une représentation graphique du poset, le diagramme de Hasse, ce qui peut permettre de travailler plus aisément dessus. Si l'ensemble est infini, on peut dessiner une partie de son diagramme de Hasse. Définition et exemples[modifier | modifier le code] Définition[modifier | modifier le code] Un ordre (ou ordre partiel) est une relation binaire sur un ensemble P qui est réflexive, antisymétrique et transitive.

Ce n'est donc pas nécessairement un ordre total. , l'intervalle. Saunders Mac Lane. Un article de Wikipédia, l'encyclopédie libre. Pour les articles homonymes, voir MacLane. Saunders MacLane. Saunders MacLane ( - ) est un mathématicien américain. Ses travaux portent principalement sur la logique et la topologie algébrique. Pendant la Seconde Guerre mondiale, il travaille sur les mathématiques appliquées et devient professeur à Chicago en 1947. Bibliographie[modifier | modifier le code] Lien externe[modifier | modifier le code] (en) John J. Scroll and Key (Cf. Yale rite chanté du troubadour) The Scroll and Key Tomb The Scroll and Key Society is a secret society, founded in 1842 at Yale University, in New Haven, Connecticut. It is the second oldest[1][2] Yale secret society and has many distinguished members. Each year, the society admits fifteen rising seniors to participate in its activities and carry on its traditions.

History[edit] Facade displaying Moorish gate and patterned forecourt. Skull and Bones held a more prominent role in Yale social circles than Keys after the founding. Members of the Yale classes of '55 and '56 published the sophomoric "Inside Eli, or How to Get On at Yale," a pamphlet that provided then current pontifications "about how Yale really worked". Gifts to Yale[edit] In addition to financing its own activities, "Keys" has made significant donations to Yale over the years. Traditions[edit] Society pin Membership[edit] Members of the 1866 delegation, Scroll and Key Architecture[edit] The building in 1901 during its expansion Notable members[edit] See also[edit]

Skull and Bones. History[edit] Skull and Bones was founded in 1832 after a dispute between Yale debating societies Linonia, Brothers in Unity, and the Calliopean Society over that season's Phi Beta Kappa awards. It was co-founded by William Huntington Russell and Alphonso Taft as "the Order of the Skull and Bones".[2][3] The society's assets are managed by the society's alumni organization, the Russell Trust Association, incorporated in 1856 and named after the Bones co-founder.[2] The association was founded by Russell and Daniel Coit Gilman, a Skull and Bones member, and later president of the University of California, first president of Johns Hopkins University, and the founding president of the Carnegie Institution.

The first extended description of Skull and Bones, published in 1871 by Lyman Bagg in his book Four Years at Yale, noted that "the mystery now attending its existence forms the one great enigma which college gossip never tires of discussing. The Tomb[edit] Coordinates: Bonesmen[edit] Treillis (ensemble ordonné) Un article de Wikipédia, l'encyclopédie libre. Pour les articles homonymes, voir Treillis. Le terme treillis provient de la forme du diagramme de Hasse associé à la relation d'ordre. Un treillis (en anglais : lattice) est, en mathématiques, un ensemble partiellement ordonné dans lequel chaque couple d'éléments admet une borne supérieure et une borne inférieure. On parle aussi d'espace réticulé. Un treillis peut être vu comme le treillis de Galois d'une relation binaire. Il existe en réalité deux définitions équivalentes du treillis, une concernant la relation d'ordre citée précédemment, l'autre algébrique.

Tout ensemble muni d'une relation d'ordre total est un treillis. Parmi les ensemble munis d'une relation d'ordre partiel, les exemples les plus simples de treillis sont issus des relations d'ordre « est inclus dans » et « divise ». Il ne suffit pas que chaque paire possède des majorants et des minorants pour obtenir un treillis. Et , de la manière suivante : On peut alors vérifier que Si par. Troubadour wikipedia (lier à F. de Foix via Yale) voir acad. jeu floraux. The troubadour Perdigon playing his fiddle. A troubadour (English /ˈtruːbədʊər/, French: [tʁubaduʁ]; Occitan: trobador, IPA: [tɾuβaˈðu], archaically: [tɾuβaˈðor][citation needed]) was a composer and performer of Old Occitan lyric poetry during the High Middle Ages (1100–1350).

Since the word troubadour is etymologically masculine, a female troubadour is usually called a trobairitz. The troubadour school or tradition began in the late 11th century in Occitania, but it subsequently spread into Italy, Spain, and even Greece. Under the influence of the troubadours, related movements sprang up throughout Europe: the Minnesang in Germany, trovadorismo in Galicia and Portugal, and that of the trouvères in northern France. Dante Alighieri in his De vulgari eloquentia defined the troubadour lyric as fictio rethorica musicaque poita: rhetorical, musical, and poetical fiction.

Etymology of name[edit] Origins[edit] The early study of the troubadours focused intensely on their origins. History[edit] Virtual reality. Wolf's Head (secret society) - Wikipedia, the free encyclopedia (dans anthropologie maçonnique) Wolf's Head Society is a secret society at Yale University, New Haven, CT, USA. Membership is recomposed annually of fifteen or sixteen Yale University students, typically rising seniors. The delegation spends its year together answerable to the Phelps Association, composed of past members.

The society was founded when fifteen rising seniors from the Yale Class of 1884, with help from members of the Yale Class of 1883 who were considered publicly possible taps for the older societies, chose to abet the creation of The Third Society, later known as Wolf's Head Society.[1][2][3] Over 300 Yale College alumni and some Yale Law School faculty joined the fellowship in part to counter the dominance of Skull and Bones Society in undergraduate and university affairs.[3][4][5] The founding defeated the last attempt to abolish secret societies at Yale. Beginning in the 1850s, the Yale undergraduate student body grew more diverse. The "Old Hall" was erected within months of the founding.