Nous utilisons des cookies pour suivre les statistiques de visite, améliorer le site et vous proposer du contenu personnalisé. Sans les cookies optionnels, seuls ceux requis pour le fonctionnement de base seront conservés.
Le mathématicien A. Square est un carré résidant à Flatland, monde bidimensionnel. Après avoir décrit au lecteur son univers, Square visite Lineland (monde réduit à une seule ligne) et Pointland (avec un seul habitant, très égocentrique, un point !) avant de rencontrer un habitant de Spaceland : une sphère. Ses convictions en seront changées à jamais... Un pays à quatre dimensions existerait-il ?
%20-%20https://sketch.com%20--%3e%3ctitle%3ecc-icon%3c/title%3e%3cdesc%3eCreated%20with%20Sketch.%3c/desc%3e%3cg%20id='Symbols'%20stroke='none'%20stroke-width='1'%20fill='none'%20fill-rule='evenodd'%3e%3cg%20id='modules/partager-social-noir'%20transform='translate(-61.000000,%200.000000)'%3e%3cg%20id='social'%3e%3cg%20id='cc-icon'%20transform='translate(61.000000,%200.000000)'%3e%3ccircle%20id='Oval'%20fill='%23F55F2D'%20fill-rule='nonzero'%20cx='12'%20cy='12'%20r='12'%3e%3c/circle%3e%3cpath%20d='M14.6407545,7.27933749%20L18.718491,11.3256196%20C19.0938363,11.6980696%2019.0938363,12.3019304%2018.718491,12.6743804%20L14.6407545,16.7206625%20C14.2654092,17.0931125%2013.6568542,17.0931125%2013.281509,16.7206625%20C12.9061637,16.3482125%2012.9061637,15.7443518%2013.281509,15.3719018%20L16.6796228,12%20L13.281509,8.62809821%20C12.9061637,8.25564822%2012.9061637,7.65178748%2013.281509,7.27933749%20C13.6568542,6.9068875%2014.2654092,6.9068875%2014.6407545,7.27933749%20Z%20M10.718491,7.27933749%20C11.0938363,7.65178748%2011.0938363,8.25564822%2010.718491,8.62809821%20L7.32037724,12%20L10.718491,15.3719018%20C11.0938363,15.7443518%2011.0938363,16.3482125%2010.718491,16.7206625%20C10.3431458,17.0931125%209.7345908,17.0931125%209.35924552,16.7206625%20L5.28150896,12.6743804%20C4.90616368,12.3019304%204.90616368,11.6980696%205.28150896,11.3256196%20L9.35924552,7.27933749%20C9.7345908,6.9068875%2010.3431458,6.9068875%2010.718491,7.27933749%20Z'%20id='Combined-Shape'%20fill='%23FFFFFF'%3e%3c/path%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
%20-%20https://sketch.com%20--%3e%3ctitle%3efacebook-icon%3c/title%3e%3cdesc%3eCreated%20with%20Sketch.%3c/desc%3e%3cg%20id='Symbols'%20stroke='none'%20stroke-width='1'%20fill='none'%20fill-rule='evenodd'%3e%3cg%20id='modules/partager-social-noir'%20transform='translate(-93.000000,%200.000000)'%20fill-rule='nonzero'%3e%3cg%20id='social'%3e%3cg%20id='facebook-icon'%20transform='translate(93.000000,%200.000000)'%3e%3ccircle%20id='Oval'%20fill='%23485A96'%20cx='12'%20cy='12'%20r='12'%3e%3c/circle%3e%3cpath%20d='M16.5529888,23.9905618%20L16.5529888,14.7001348%20L19.6713708,14.7001348%20L20.1382472,11.0794607%20L16.5528989,11.0794607%20L16.5528989,8.76782022%20C16.5528989,7.71955056%2016.8439551,7.00521348%2018.347236,7.00521348%20L20.2644494,7.00431461%20L20.2644494,3.76602247%20C19.9328539,3.72197753%2018.7946966,3.62337079%2017.4707416,3.62337079%20C14.706427,3.62337079%2012.8139326,5.31065169%2012.8139326,8.40934831%20L12.8139326,11.0794607%20L9.68755056,11.0794607%20L9.68755056,14.7001348%20L12.8139326,14.7001348%20L12.8139326,23.9905618%20L16.5529888,23.9905618%20L16.5529888,23.9905618%20Z'%20id='Path'%20fill='%23FFFFFF'%3e%3c/path%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
%20-%20https://sketch.com%20--%3e%3ctitle%3etwitter-icon%3c/title%3e%3cdesc%3eCreated%20with%20Sketch.%3c/desc%3e%3cg%20id='Symbols'%20stroke='none'%20stroke-width='1'%20fill='none'%20fill-rule='evenodd'%3e%3cg%20id='modules/partager-social-noir'%20transform='translate(-189.000000,%200.000000)'%20fill-rule='nonzero'%3e%3cg%20id='social'%3e%3cg%20id='twitter-icon'%20transform='translate(189.000000,%200.000000)'%3e%3ccircle%20id='Oval'%20fill='%232DAAE1'%20cx='12.0036902'%20cy='11.9970511'%20r='11.9952019'%3e%3c/circle%3e%3cpath%20d='M19.6948345,7.2255675%20C19.1290438,7.47663176%2018.5213412,7.64635674%2017.8823981,7.72264541%20C18.5344972,7.33215984%2019.0340597,6.71337849%2019.2699314,5.97692604%20C18.6504903,6.34483823%2017.9725677,6.60384821%2017.2656126,6.74270462%20C16.6902909,6.12946265%2015.8698925,5.74659372%2014.9622487,5.74659372%20C13.2200729,5.74659372%2011.8071644,7.15893201%2011.8071644,8.90212608%20C11.8071644,9.14911726%2011.8349835,9.3900803%2011.888463,9.62143088%20C9.26585155,9.48962622%206.94073746,8.23336811%205.38441601,6.32448141%20C5.11266054,6.79068542%204.95710986,7.33273007%204.95710986,7.91106579%20C4.95710986,9.00570434%205.5142656,9.97151157%206.36085396,10.5372615%20C5.85968767,10.5217314%205.36952029,10.386456%204.9313273,10.1427436%20L4.9313273,10.182619%20C4.9313273,11.7116508%206.0188787,12.9866043%207.46253892,13.2765665%20C7.1973411,13.3492301%206.91902797,13.3871911%206.6311024,13.3871911%20C6.42753018,13.3871911%206.23002683,13.3679255%206.03708534,13.3316344%20C6.43864967,14.5848784%207.6040375,15.4971247%208.98448363,15.5229073%20C7.90450815,16.3694957%206.54369424,16.8741495%205.065698,16.8741495%20C4.8111309,16.8741495%204.55953714,16.8589569%204.31254595,16.8291828%20C5.70924364,17.7247702%207.36759558,18.2475899%209.14968749,18.2475899%20C14.9536545,18.2475899%2018.1278823,13.439245%2018.1278823,9.26939513%20C18.1278823,9.13249912%2018.1248682,8.99662139%2018.1182698,8.86123242%20C18.7367116,8.41391079%2019.2705647,7.86004525%2019.6948345,7.2255675%20L19.6948345,7.2255675%20Z'%20id='Path'%20fill='%23FFFFFF'%3e%3c/path%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
%20-%20https://sketch.com%20--%3e%3ctitle%3ewhatsapp-icon%3c/title%3e%3cdesc%3eCreated%20with%20Sketch.%3c/desc%3e%3cdefs%3e%3clinearGradient%20x1='49.9999512%25'%20y1='-3.686129e-16%25'%20x2='49.9999512%25'%20y2='100.000098%25'%20id='linearGradient-1'%3e%3cstop%20stop-color='%2361FD7D'%20offset='0%25'%3e%3c/stop%3e%3cstop%20stop-color='%232BB826'%20offset='100%25'%3e%3c/stop%3e%3c/linearGradient%3e%3c/defs%3e%3cg%20id='Symbols'%20stroke='none'%20stroke-width='1'%20fill='none'%20fill-rule='evenodd'%3e%3cg%20id='modules/partager-social-noir'%20transform='translate(-157.000000,%200.000000)'%20fill-rule='nonzero'%3e%3cg%20id='social'%3e%3cg%20id='whatsapp-icon'%20transform='translate(157.000000,%200.000000)'%3e%3ccircle%20id='Oval'%20fill='url(%23linearGradient-1)'%20cx='12'%20cy='12'%20r='12'%3e%3c/circle%3e%3cpath%20d='M17.6688616,6.32515459%20C16.1647913,4.82656181%2014.1645421,4.00084231%2012.0333871,4%20C7.64234107,4%204.06855518,7.55643386%204.06679791,11.9278748%20C4.06623385,13.325218%204.43306915,14.6892146%205.13020591,15.8915098%20L4,20%20L8.22319435,18.8975072%20C9.38681007,19.5291075%2010.6968648,19.8619697%2012.0302197,19.8625313%20L12.0334956,19.8625313%20C16.4241078,19.8625313%2019.9982191,16.3056655%2020,11.9341813%20C20.0008442,9.81573736%2019.1729753,7.82374737%2017.6688616,6.32515459%20Z%20M12.0334956,18.5235016%20L12.0307838,18.5235016%20C10.8426314,18.523048%209.6772801,18.2053905%208.66064583,17.6049772%20L8.41883695,17.4621738%20L5.91273292,18.11643%20L6.5816666,15.6847128%20L6.42418494,15.4353901%20C5.76136915,14.3862002%205.41130384,13.1734949%205.41182393,11.9283932%20C5.41325636,8.29505023%208.38366988,5.3390513%2012.0360556,5.3390513%20C13.8046274,5.33972082%2015.4671556,6.0260926%2016.7173114,7.27164788%20C17.9674671,8.51720316%2018.6555572,10.1728969%2018.6549068,11.9336846%20C18.6534745,15.5673298%2015.6830827,18.5235016%2012.0334956,18.5235016%20L12.0334956,18.5235016%20Z%20M15.66551,13.5881256%20C15.466418,13.488971%2014.4877928,13.0096987%2014.3053188,12.9435884%20C14.1228666,12.8774566%2013.9901819,12.8444122%2013.8574322,13.0427646%20C13.7247693,13.2410738%2013.3432901,13.6873018%2013.2271368,13.8195007%20C13.1110268,13.9517213%2012.9949169,13.968265%2012.7958683,13.8690888%20C12.5967979,13.7699342%2011.9554165,13.5607399%2011.1951048,12.8858364%20C10.6033825,12.3606044%2010.2038533,11.7118124%2010.0877434,11.51346%20C9.97163348,11.3151293%2010.0753991,11.2079404%2010.1750428,11.1091529%20C10.2645767,11.0204084%2010.3740914,10.8777778%2010.4736266,10.7621011%20C10.5731401,10.6464459%2010.606333,10.5637703%2010.6726753,10.4315714%20C10.7390393,10.2993509%2010.7058464,10.1836525%2010.6560789,10.0844979%20C10.606333,9.98534333%2010.2082139,9.01025481%2010.0423364,8.61361486%20C9.88077617,8.22732016%209.71663424,8.27958635%209.59444982,8.27351743%20C9.47847008,8.26777246%209.34563357,8.266563%209.21294892,8.266563%20C9.08026428,8.266563%208.86459749,8.31612949%208.68214525,8.51446027%20C8.49969302,8.71279104%207.98546408,9.19206342%207.98546408,10.1671303%20C7.98546408,11.1421973%208.69871999,12.0842198%208.79825517,12.2164188%20C8.89779035,12.3486393%2010.2018791,14.3496355%2012.1987006,15.2077298%20C12.6736405,15.4118271%2013.0444025,15.533724%2013.3335058,15.6250386%20C13.8103548,15.7757683%2014.2442917,15.7545163%2014.5873062,15.7035243%20C14.96974,15.6466578%2015.7649801,15.2242951%2015.930901,14.7615449%20C16.0967785,14.2987731%2016.0967785,13.9021548%2016.0470109,13.8195223%20C15.9972433,13.7368899%2015.8645587,13.6873018%2015.66551,13.5881256%20L15.66551,13.5881256%20Z'%20id='Shape'%20fill='%23FFFFFF'%3e%3c/path%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
