{"product_id":"fourier-series-print-square-wave-maths-line-art-poster","title":"Fourier Series Print - Square Wave Maths Line Art Poster","description":"\u003ch2\u003eFourier Series Print\u003c\/h2\u003e\n\u003cp\u003eA smooth navy sine wave at the top gains more and more harmonics on the way down until, in terracotta at the bottom, it has squared itself off. A lovely gift for engineers, musicians and anyone who has wondered how a synthesiser builds a sound.\u003c\/p\u003e\n\u003cp\u003ePart of our Waves set in the Poster Kingz Puzzle \u0026amp; Science range. The fact behind the art: A square wave is the sum of odd harmonics: (4\/pi)(sin x + sin 3x\/3 + sin 5x\/5 + ...). Rows use 1, 2, 3, 4, 5, 6, 7, 8, 10, 13, 20 and 50 terms; the small overshoot at each jump is the Gibbs phenomenon. Joseph Fourier presented the idea in 1807. Every design is drawn in code from the real data, so the details are right, then printed in our modern palette of cream, navy, terracotta, mustard and teal.\u003c\/p\u003e\n\u003ch3\u003eProduct details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eExclusive Poster Kingz design\u003c\/li\u003e\n  \u003cli\u003eAvailable in A5, A4, A3 and A2 unframed sizes\u003c\/li\u003e\n  \u003cli\u003eAlso available framed in A5, A4 and A3, ready to hang straight out of the box\u003c\/li\u003e\n  \u003cli\u003ePrinted on premium quality paper stock\u003c\/li\u003e\n  \u003cli\u003eDesigned and printed in the UK by Poster Kingz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSee the rest of the set in our \u003ca href=\"\/collections\/science-posters\"\u003eScience Posters\u003c\/a\u003e collection, or browse the whole \u003ca href=\"\/collections\/puzzle-science-posters\"\u003ePuzzle \u0026amp; Science Posters\u003c\/a\u003e range.\u003c\/p\u003e","brand":"Poster Kingz","offers":[{"title":"A5 (unframed) 5.8 × 8.3 in","offer_id":58255694823806,"sku":null,"price":7.99,"currency_code":"GBP","in_stock":true},{"title":"A4 (unframed) 8.3 × 11.7 in","offer_id":58255694856574,"sku":null,"price":9.99,"currency_code":"GBP","in_stock":true},{"title":"A3 (unframed) 11.7 × 16.5 in","offer_id":58255694889342,"sku":null,"price":14.99,"currency_code":"GBP","in_stock":true},{"title":"A2 (unframed) 16.5 × 23.4 in","offer_id":58255694922110,"sku":null,"price":22.99,"currency_code":"GBP","in_stock":true},{"title":"A5 Framed","offer_id":58255694954878,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true},{"title":"A4 Framed","offer_id":58255694987646,"sku":null,"price":24.99,"currency_code":"GBP","in_stock":true},{"title":"A3 Framed","offer_id":58255695020414,"sku":null,"price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0695\/8989\/3410\/files\/fourier-series-print-square-wave-maths-line-art-poster-1.jpg?v=1792269645","url":"https:\/\/posterkingzuk.com\/products\/fourier-series-print-square-wave-maths-line-art-poster","provider":"Poster Kingz","version":"1.0","type":"link"}