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        "intro": "In this Section we address the following problem:\n<p><\/p>\n<i>Can we find a Fourier series expansion of a function defined over a finite interval?<\/i>\n<p><\/p>\nOf course we recognise that such a function could not be periodic (as periodicity demands an infinite\ninterval). The answer to this question is yes but we must first convert the given non-periodic function\ninto a periodic function. There are many ways of doing this. We shall concentrate on the most useful\nextension to produce a so-called <b>half-range Fourier series<\/b>.",
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