{"id":10562,"date":"2019-03-30T06:00:24","date_gmt":"2019-03-30T06:00:24","guid":{"rendered":"http:\/\/cafebarbantia.barbantia.es\/?p=10562"},"modified":"2019-03-27T07:56:21","modified_gmt":"2019-03-27T07:56:21","slug":"un-rally-matematico","status":"publish","type":"post","link":"http:\/\/cafebarbantia.barbantia.es\/?p=10562","title":{"rendered":"Un rally matem\u00e1tico"},"content":{"rendered":"<p lang=\"es-ES\" align=\"justify\"><span style=\"font-family: 'Times New Roman', serif; font-size: large;\"><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\"><a href=\"http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/maxresdefault.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-medium wp-image-10563\" alt=\"maxresdefault\" src=\"http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/maxresdefault-300x168.jpg\" width=\"300\" height=\"168\" srcset=\"http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/maxresdefault-300x168.jpg 300w, http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/maxresdefault-1024x576.jpg 1024w, http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/maxresdefault-900x506.jpg 900w, http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/maxresdefault.jpg 1280w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><em><strong>X. Ricardo Losada.<\/strong>\u00a0<\/em>Hai anos exist\u00eda unha competici\u00f3n acad\u00e9mica chamada <\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\"><i>Rally Matem\u00e1tico sen fronteiras <\/i><\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\">promovido por ENCIGA, a Asociaci\u00f3n dos ensinantes de Ciencias de Galicia. Non sei moi ben en que consist\u00eda, nin se serviu para promover e popularizar as matem\u00e1ticas<!--more-->, pero sei que o nome exerc\u00eda sobre min unha fascinaci\u00f3n especial. Parec\u00edame xenial que ese cualificativo de <\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\"><i>sen fronteiras <\/i><\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\">fose aplicable a termos en principio tan dis\u00edmiles como <\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\"><i>rally <\/i><\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\">e <\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\"><i>matem\u00e1ticas. <\/i><\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\">Porque, no caso das matem\u00e1ticas, \u00e9 verdade. Non te\u00f1en fronteiras, nin temporais nin espaciais. Catro por dous son 8 en China, en Europa, en \u00c1frica; pero tam\u00e9n na Prehistoria, na actualidade e no s\u00e9culo tres mil. <\/span><\/span><\/span><\/p>\n<p lang=\"es-ES\" align=\"justify\"><span style=\"font-family: 'Times New Roman', serif; font-size: large;\"><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\">Tam\u00e9n me parece evidente a relaci\u00f3n entre rally e matem\u00e1ticas. M\u00e1is al\u00e1 do aspecto competitivo, parece evidente que un rally funciona con algoritmos matem\u00e1ticos relacionados co espazo e co tempo. Tanto o funcionamento como o dese\u00f1o, a conduci\u00f3n ou a velocidade dun coche dependen das matem\u00e1ticas. E o mesmo podemos dicir do trazado do percorrido, desde a distancia ata as curvas e os peraltes, as\u00ed como moitas outras circunstancias relacionadas coa organizaci\u00f3n, desde o n\u00famero dos participantes ata os premios ou a clasificaci\u00f3n por puntos. <\/span><\/span><\/span><\/p>\n<p lang=\"es-ES\" align=\"justify\"><span style=\"font-family: 'Times New Roman', serif; font-size: large;\"><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\"><a href=\"http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/3.3.Matematicas.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignleft size-full wp-image-10564\" alt=\"3.3.Matematicas\" src=\"http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/3.3.Matematicas.png\" width=\"280\" height=\"280\" srcset=\"http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/3.3.Matematicas.png 280w, http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/3.3.Matematicas-150x150.png 150w, http:\/\/cafebarbantia.barbantia.es\/wp-content\/uploads\/2019\/03\/3.3.Matematicas-144x144.png 144w\" sizes=\"(max-width: 280px) 100vw, 280px\" \/><\/a>Contareivos algo que lle pasou ao fil\u00f3sofo Descartes, e que considero a raz\u00f3n profunda da mi\u00f1a fascinaci\u00f3n polos rallys matem\u00e1ticos. Debido a unha precaria sa\u00fade, pasaba moitas horas na cama pensando sobre temas moi profundos. Un d\u00eda, mirando o teito, <\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\">viu<\/span><\/span><span style=\"color: #000000;\"><span style=\"font-family: Calibri, sans-serif;\"> unha mosca e seguiu a s\u00faa traxectoria durante bastante tempo mentres se preguntaba se ser\u00eda quen de determinar en cada instante a s\u00faa posici\u00f3n. Acabou conclu\u00edndo que si, sempre que se co\u00f1ecese a distancia da mosca a d\u00faas superficies perpendiculares, neste caso a parede e o teito. Posu\u00eddo por esa revelaci\u00f3n, levantouse da cama e debuxou nun papel d\u00faas rectas perpendiculares. Calquera punto da folla, deduciu, quedaba determinado pola s\u00faa distancia a eses dous eixos, inventando as\u00ed as coordenadas cartesianas e a Xeometr\u00eda Anal\u00edtica. Un descubrimento fundamental da historia da matem\u00e1tica grazas, como vedes, ao voo dunha mosca. Voo, por certo, cuxa traxectoria parece non ter fronteiras e cuxo zunido recorda o do motor dun coche competindo a toda velocidade nun rally. <\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>X. Ricardo Losada.\u00a0Hai anos exist\u00eda unha competici\u00f3n acad\u00e9mica chamada Rally Matem\u00e1tico sen fronteiras promovido por ENCIGA, a Asociaci\u00f3n dos ensinantes de Ciencias de Galicia. Non sei moi ben en que consist\u00eda, nin se serviu para promover e popularizar as matem\u00e1ticas<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[39,7,9,26],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=\/wp\/v2\/posts\/10562"}],"collection":[{"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10562"}],"version-history":[{"count":1,"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=\/wp\/v2\/posts\/10562\/revisions"}],"predecessor-version":[{"id":10565,"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=\/wp\/v2\/posts\/10562\/revisions\/10565"}],"wp:attachment":[{"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10562"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/cafebarbantia.barbantia.es\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}