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  2. Raised-cosine filter - Wikipedia

    en.wikipedia.org/wiki/Raised-cosine_filter

    The raised-cosine filter is an implementation of a low-pass Nyquist filter, i.e., one that has the property of vestigial symmetry. This means that its spectrum exhibits odd symmetry about , where is the symbol-period of the communications system. Its frequency-domain description is a piecewise -defined function, given by:

  3. Coupon (finance) - Wikipedia

    en.wikipedia.org/wiki/Coupon_(finance)

    In finance, a coupon is the interest payment received by a bondholder from the date of issuance until the date of maturity of a bond . Coupons are normally described in terms of the "coupon rate", which is calculated by adding the sum of coupons paid per year and dividing it by the bond's face value. For example, if a bond has a face value of ...

  4. Coupon collector's problem - Wikipedia

    en.wikipedia.org/wiki/Coupon_collector's_problem

    Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: If each box of a brand of cereals contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be ...

  5. Australian fifty-dollar note - Wikipedia

    en.wikipedia.org/wiki/Australian_fifty-dollar_note

    15 February 2018. The Australian fifty-dollar note is an Australian banknote with a face value of fifty Australian dollars ($50). Since 1995 it has been a polymer banknote featuring portraits of Edith Cowan, first female member of an Australian parliament, and inventor and Australia's first published Aboriginal Australian author, David Unaipon.