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Mah. Capisco l’idea di volere raccontare in poche parole molti concetti matematici. Per\u00f2 mi pare che questo libro (Richard Brown (ed.), Matematica in 30 secondi<\/a><\/em> [30-Second Maths], Logos 2012 [2012], pag. 160, € 19.95, ISBN 9788879408639, trad. Simone Monticelli) abbia dei problemi di ipersemplificazione. Per dire, troviamo scritto che \u00abA good way of identifying an irrational number is to check that its decimal expansion does not repeat.\u00bb Se uno dovesse davvero verificare la successione delle cifre decimali per vedere se un numero \u00e8 irrazionale, saremmo messi piuttosto male. Altra frase: \u00abAlso known as a natural or counting number, a whole number is any positive integer on a number line or continuum. Opinion varies, however, on whether 0 is a whole number.\u00bb I numeri interi (“whole numbers”) sono quelli positivi e negativi, oltre allo zero. Sono i naturali che possono o no avere lo zero a seconda di chi li definisce. Anche l’idea di indicare alcune “persone chiave” sui vari concetti non \u00e8 ben definita. Che ha a che fare per esempio sir Roger Penrose col rapporto aureo? (ok, un’idea ce l’avrei, ma non la si pu\u00f2 evincere dal testo). Anche la traduzione di Simone Monticelli non mi \u00e8 piaciuta. Per esempio, “Another dimension” diventa “Oltre le due dimensioni” che non ha un grande senso visto il contesto di quella pagina; ma soprattutto come si fa a scrivere “numeri trascendentali” anzich\u00e9 trascendenti?<\/p>\n","protected":false},"excerpt":{"rendered":"“numeri 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