Спектр и спектральная плотность - Broneslav Kiselman
Фурье-спектр и преобразование Фурье.
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![[МВД России] Владимир Колокольцев выступил на пленарном заседании Международного полицейского саммита](https://sun9-15.userapi.com/impg/_VN4QHAcvuxAk7VF31igz9YV2L1d6ui-MnMzVA/OydLmvD1RXA.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=7799e8c619dc4f99bed3837e21cc1240&c_uniq_tag=ay4L2V5TksdAfdGUwnWJpGkpDe0rR4hlwigY2jQ3vME&type=video_thumb)
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