$Les mathématiciens précoces$

Les mathématiciens précoces

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Détails bibliographiques
Publié dans:	Tangente No 111
Support:	Article de revue
Langue:	Français
Publié:	2006.
Sujets:	Articles de périodiques
Résumé:	Ils s'appellent Gallois, Pascal, Théétète, Clairaut, Minkowski, Bolyai, Ada Lovelace ou, plus près de nous, Don Zagier. Ils ont découvert les mathématiques enfants ou adolescents. Autodidactes ou héritiers d'une tradition d'excellence familiale, ils ont entretenus des affinités exceptionnelles avec cette discipline, la marquant parfois de leur griffe avant même de parvenir à l'âge adulte.
Lien:	Dans: Tangente

Table des matières:

Titres des articles du dossier : Ces Mozart des mathématiques ; La précocité en question ; 2000 an avant Gallois, Théétète ; Des mathématiques en héritage et le génie en partage ; Sophie Germain, une pionnière ; Janos Bolyai (1802-1860) ; Ada Augusta King, comtesse de Lovelace ; Hermann Minkowski, Grand prix de l'Académie à 18 ans ; Lajos Posa, du prodige au pédagogue ; Itinéraires cosmopolites d'un mathématicien précoce.

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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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Les mathématiciens précoces

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