{"id":3503,"date":"2020-11-29T22:23:11","date_gmt":"2020-11-29T22:23:11","guid":{"rendered":"https:\/\/marcopachiega.com\/blog\/?p=3503"},"modified":"2021-01-10T09:04:57","modified_gmt":"2021-01-10T09:04:57","slug":"numeri-misteriosi-a-barcellona","status":"publish","type":"post","link":"https:\/\/marcopachiega.com\/blog\/numeri-misteriosi-a-barcellona\/","title":{"rendered":"Numeri misteriosi a Barcellona"},"content":{"rendered":"<h1 style=\"text-align: center;\"><strong>Numeri misteriosi a Barcellona<\/strong><\/h1>\n<h2 style=\"text-align: center;\">Un&#8217;opera artistica che racchiude i fondamenti della natura<\/h2>\n<h3><a href=\"https:\/\/marcopachiega.com\/besp\/numeros-misteriosos-en-barcelona\/\"><em><strong>Espa\u00f1ol<\/strong><\/em><\/a><\/h3>\n<p>&nbsp;<\/p>\n<h3><strong><a href=\"https:\/\/marcopachiega.com\/beng\/?p=3490&amp;preview=true\"><em>English<\/em><\/a><\/strong><\/h3>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-3501\" src=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_150437_035.jpg\" alt=\"\" width=\"400\" height=\"536\" srcset=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_150437_035.jpg 864w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_150437_035-744x996.jpg 744w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_150437_035-314x420.jpg 314w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Camminando per il Paseo de Joan Borb\u00f2, al lato del distretto della Barceloneta, la vista difficilmente si distoglie dai lussuosi yacht ormeggiati, dalle palme ed i ristoranti da poco riaperti. L\u2019odore del mare non lascia spazio ad altri pensieri se non quello di raggiungere la spiaggia e rilassarsi al sole.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-3499 lazyload\" data-src=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_133905_411.jpg\" alt=\"\" width=\"400\" height=\"299\" data-srcset=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_133905_411.jpg 1156w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_133905_411-744x556.jpg 744w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_133905_411-420x314.jpg 420w\" data-sizes=\"(max-width: 400px) 100vw, 400px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 400px; --smush-placeholder-aspect-ratio: 400\/299;\" \/><\/p>\n<p>Pochi turisti danno finalmente spazio per godersi anche l\u2019ambiente circostante. D\u2019un tratto i miei occhi vengono attirati da uno strano particolare al suolo. Un quadrato incastonato a terra con all&#8217;interno un numero, uno grande, 6765. Soffermandomi a guardare la sagoma ne noto un\u2019altra poco pi\u00f9 in l\u00e0. Incuriosito proseguo in direzione retta per osservare da pi\u00f9 vicino e mi ritrovo con un altro numero! 4181, che strano! Come in una caccia al tesoro aguzzo la vista e individuo altri quadrati contenenti ulteriori cifre poco a poco sempre pi\u00f9 vicinie tra loro. A prima vista non c\u2019\u00e8 nessuna correlazione apparente. Sembrano numeri messi a caso: 6765 poco pi\u00f9 in l\u00e0 4181 a seguire 2584 e cosi via. Termino di scoprire l\u2019intera sequenza arrivando al finale o forse il principio con il numero 1.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-3497 lazyload\" data-src=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120656_630.jpg\" alt=\"\" width=\"399\" height=\"534\" data-srcset=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120656_630.jpg 864w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120656_630-744x996.jpg 744w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120656_630-314x420.jpg 314w\" data-sizes=\"(max-width: 399px) 100vw, 399px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 399px; --smush-placeholder-aspect-ratio: 399\/534;\" \/><\/p>\n<p>Mi giro e osservo da lontano l\u2019intera serie. Che cosa rappresentano questi numeri posti in linea retta senza nessuna logica apparente? Mi soffermo ad analizzare: non sono solamente numeri pari, nemmeno una sequenza di soli dispari o di numeri primi. Per capire il significato di questa strana sequenza, timidamente nascosta a terra, bisogna retrocedere all&#8217;anno 1992. Anzi no molto pi\u00f9 indietro al 1200!<\/p>\n<h3>Un po di storia<\/h3>\n<p>Non \u00e8 uno scherzo. Tutto inizia alla fine del XII secolo con un mercante marittimo rispettato e ben conosciuto di origini pisane, Guglielmo dei Bonacci. Insieme a suo figlio, <a href=\"https:\/\/it.wikipedia.org\/wiki\/Leonardo_Fibonacci\" target=\"_blank\" rel=\"noopener noreferrer\">Leonardo detto \u201cil Fibonacci\u201d<\/a> (figlio dei Bonacci) rimasero per alcuni anni nel porto di B\u00e9ja\u00efa. La citt\u00e0 \u00e8 un antichissimo centro di scambio commerciale dell\u2019Algeria che si affaccia sul Mar Mediterraneo. Qui Leonardo studi\u00f2 molti testi e trattati di matematica di origine araba e indiana i quali diedero spunto per redattare il suo mastodontico libro il \u201c<a href=\"https:\/\/it.wikipedia.org\/wiki\/Liber_abbaci\" target=\"_blank\" rel=\"noopener noreferrer\">Liber Abbaci<\/a>\u201d. Il testo \u00e8 una pietra miliare della matematica e l\u2019autore \u00e8 uno dei pi\u00f9 importanti della storia della matematica. Il libro tra le tante funzioni e regole di aritmetica e trigonometria spicca per una formula molto semplice ma al tempo stesso interessantissima.<\/p>\n<p>F{n}=F{{n-1}}+F_{{n-2}}<\/p>\n<h3>&#8230;e un p\u00f2 di matematica<\/h3>\n<p><strong>Se non vi appassiona la matematica potete saltare l\u2019intero paragrafo<\/strong> ma questa serie ci riguarda molto da vicino. Ve la spiego o almeno ci provo. Il risultato della successione \u00e8 dato dalla somma dei due numeri precedenti contigui es. 0+1=1, 1+1=2. Seguendo questo schema si prosegue 2+1=3; 3+2=5; 5+3=8 e cos\u00ec via. Si ottengono i risultati: 0,1,1,2,3,5,8,13,21,34,55,89,144,233,&#8230;A prima vista sembra un gioco per bambini. In questa serie per\u00f2 si nasconde una costante potentissima. Come scoprirla? Semplice.Proviamo a dividere un risultato della serie con il suo precedente. 8:5=1,6; 13:8=1,625; 21:13=1,615384&#8230;Man mano che si continua con le divisioni il risultato del rapporto si avvicina poco a poco ad una costante chiamata <strong>numero aureo<\/strong> o <strong>proporzione aurea<\/strong> che \u00e8 appunto <strong>1,6180339887&#8230;<\/strong> Incredibile! Ora senza annoiarvi troppo con le formule arriviamo al dunque. Che ci facciamo con la sezione aurea? A primo impatto nulla per\u00f2 si tratta di una costante presente in natura. I semi di girasole, le foglie distribuite lungo lo stelo di una pianta o la forma del guscio del Nautilus seguono questa costante. Il numero sembra essere presente anche nella formazione a spirale delle galassie! Un collegamento con il macro e il micro cosmo. La proporzione aurea \u00e8 un numero irrazionale, il che significa che non ha fine e la successione dei suoi decimali non segue mai uno schema. Ultimamente grazie ai super computer siamo arrivati a calcolarne il decimilionesimo di decimale!<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-3495 lazyload\" data-src=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120201_750.jpg\" alt=\"Numeri misteriosi a Barcellona\" width=\"400\" height=\"536\" data-srcset=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120201_750.jpg 864w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120201_750-744x996.jpg 744w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120201_750-314x420.jpg 314w\" data-sizes=\"(max-width: 400px) 100vw, 400px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 400px; --smush-placeholder-aspect-ratio: 400\/536;\" \/><\/p>\n<h3>Arte e numeri&nbsp;<\/h3>\n<p>Per continuare la nostra storia ci fermiamo al 1925. In questa data nasce un famoso artista Italiano <a href=\"https:\/\/it.wikipedia.org\/wiki\/Mario_Merz\" target=\"_blank\" rel=\"noopener noreferrer\">Mario Mertz<\/a> (1925-2003), conosciuto in tutto il mondo per le sue opere e sculture realizzate in arte povera usando differenti materiali quali tubi al neon, ferro, cera e pietra.<\/p>\n<p>Finalmente avanziamo al 1992 l\u2019anno delle Olimpiadi di Barcellona! Ed ecco che in questa data, proprio a pochi giorni dell\u2019apertura ufficiale, Mario Mertz d\u00e0 il suo tocco artistico alla citt\u00e0 con un\u2019opera originale denominata \u201cCrescendo Appare\u201d. Incastonati sotto un resistente vetro blindato Mario riproduce i primi numeri della serie di Fibonacci con dei tubi al neon nei pressi del Port Vell. Le caselle sono posizionate poco a poco sempre pi\u00f9 a maggior distanza raggiungendo una lunghezza totale di circa 160 metri!<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-3496 lazyload\" data-src=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120546_261.jpg\" alt=\"Numeri misteriosi a Barcellona\" width=\"400\" height=\"535\" data-srcset=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120546_261.jpg 864w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120546_261-744x995.jpg 744w, https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201123_120546_261-314x420.jpg 314w\" data-sizes=\"(max-width: 400px) 100vw, 400px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 400px; --smush-placeholder-aspect-ratio: 400\/535;\" \/><\/p>\n<p>Mario unisce la potenza della natura, la conoscenza scientifica e artistica dell\u2019uomo e le origini di mercante marittimo di Leonardo Fibonacci posizionando l\u2019opera proprio nei pressi del porto di Barcellona importante tanto quanto quello di B\u00e9ja\u00efa. Tutto risulta pi\u00f9 chiaro finalmente. Un\u2019opera potente, silenziosa ma preziosa come un tesoro. Il progetto artistico fino a qualche anno fa si illuminava durante la notte, oggi purtroppo l\u2019impianto elettrico non funziona per problemi di infiltrazioni e mantenimento.<\/p>\n<p>Un\u2019opera ora pi\u00f9 che mai silenziosa e spesso dimenticata dalla maggior parte delle persone che ci camminano sopra senza accorgersene. Chiss\u00e0 proprio come la costante aurea, invisibile ma presente ovunque in natura. &nbsp;<\/p>\n<p>Marco Pachiega<\/p>\n<p>Vuoi leggere un altro articolo? Dai un\u2019occhiata alla sezione&nbsp;<a href=\"https:\/\/marcopachiega.com\/blog\/viaggi-e-altre-storie\/\" rel=\"noopener noreferrer\"><strong>Viaggi e altre storie!<\/strong><\/a>&nbsp;o goditi la gallery qui di seguito.<\/p>\n\n<div class=\"gdgallery-gallery-container\" id=\"gdgallery-container-48\" data-id=\"48\">\n    \n<div id=\"gdgallery_container_48\" style=\"display:none;\" data-view=\"justified\">\n            <a href=\"\" target=\"_blank\">\n            <img decoding=\"async\" alt=\"\"\n                 data-type=\"image\"\n                 data-src=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_150437_035.jpg\"\n                 data-image=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_150437_035.jpg\"\n                 data-description=\"\"\n                                 style=\"--smush-placeholder-width: 864px; --smush-placeholder-aspect-ratio: 864\/1157;display:block\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\">\n        <\/a>\n            <a href=\"\" target=\"_blank\">\n            <img decoding=\"async\" alt=\"\"\n                 data-type=\"image\"\n                 data-src=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_133905_411.jpg\"\n                 data-image=\"https:\/\/marcopachiega.com\/blog\/wp-content\/uploads\/sites\/9\/2020\/11\/IMG_20201125_133905_411.jpg\"\n                 data-description=\"\"\n                                 style=\"--smush-placeholder-width: 1156px; 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English Camminando per il Paseo de Joan Borb\u00f2, al lato del distretto della Barceloneta, la vista difficilmente si distoglie dai lussuosi yacht ormeggiati, dalle palme ed i ristoranti da poco riaperti. L\u2019odore del mare non lascia spazio ad altri pensieri se non quello di raggiungere la spiaggia e rilassarsi al sole. Pochi turisti danno finalmente spazio per godersi anche l\u2019ambiente circostante. D\u2019un tratto i miei occhi vengono attirati da uno strano particolare al suolo. Un quadrato incastonato a terra con all&#8217;interno un numero, uno grande, 6765. Soffermandomi a guardare la sagoma ne noto un\u2019altra poco pi\u00f9&hellip; <a class=\"read-more\" href=\"https:\/\/marcopachiega.com\/blog\/numeri-misteriosi-a-barcellona\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":3500,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[463,184],"tags":[],"class_list":["post-3503","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-barcellona","category-viaggi-scappatelle-e-altre-storie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Numeri misteriosi a Barcellona - Pachiega&#039;s blog<\/title>\n<meta name=\"description\" content=\"Numeri misteriosi a Barcellona. 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