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三角形関数
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Wikipedia definition
1. Triangular function​The triangular function (also known as the triangle function, hat function, or tent function) is defined either as: or, equivalently, as the convolution of two identical unit rectangular functions: The triangular function can also be represented as the product of the rectangular and absolute value functions: The function is useful in signal processing and communication systems engineering as a representation of an idealized signal, and as a prototype or kernel from which more realistic signals can be derived.
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