Géométries non-euclidiennes

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Détails bibliographiques
Publié dans:	Tangente No 110
Support:	Article de revue
Langue:	Français
Publié:	2006.
Sujets:	Articles de périodiques
Résumé:	La géométrie d'Euclide se base essentiellement sur 5 postulats principaux dont le fameux "en un point il ne passe qu'une parallèle à une droite donnée". C'est à partir du XIXème sièle qu'avec Gauss, Bolyai, Lobatchevski ou encore Riemann, on osa rêver de mondes sphériques, hyperboliques, ...
Lien:	Dans: Tangente


LEADER	01104nam a22001817a 4500
001	244295
008	070215c2006 xx \|\|\| \|\|\|\| 00\| 0 fre d
041	0		\|a fre
245	1	0	\|a Géométries non-euclidiennes \|c Hervé Lehning, Cherif Zananiri, Gilles Cohen, Nicola Delerue, Norbert Verdier, Élisabeth Busser, Jean-François Rotgé.
260			\|c 2006.
300			\|a p. 7-29.
505	1		\|a Titres des articles du dossier : Le postulat d'Euclide ; Et l'on créa les géométries non-euclidiennes ... ; Euclide, Lobatchecski et Riemann ; En physique, l'univers n'est pas plat ! ; A l'est, tout de nouveau ! ; Le disque de Poincaré : tout un monde ; La géométrie projective.
520			\|a La géométrie d'Euclide se base essentiellement sur 5 postulats principaux dont le fameux "en un point il ne passe qu'une parallèle à une droite donnée". C'est à partir du XIXème sièle qu'avec Gauss, Bolyai, Lobatchevski ou encore Riemann, on osa rêver de mondes sphériques, hyperboliques, ...
650			\|a Articles de périodiques
773	0		\|t Tangente \|g No 110
993			\|a Article de revue
994			\|a BC
997			\|0 244295

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return true; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data) { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data); }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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Géométries non-euclidiennes

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