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  2. Coupon - Wikipedia

    en.wikipedia.org/wiki/Coupon

    Coupon. In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product . Customarily, coupons are issued by manufacturers of consumer packaged goods [1] or by retailers, to be used in retail stores as a part of sales promotions. They are often widely distributed through mail ...

  3. Shapiro reaction - Wikipedia

    en.wikipedia.org/wiki/Shapiro_reaction

    The Shapiro reaction or tosylhydrazone decomposition is an organic reaction in which a ketone or aldehyde is converted to an alkene through an intermediate hydrazone in the presence of 2 equivalents of organolithium reagent. [1] [2] [3] The reaction was discovered by Robert H. Shapiro in 1967. [4] The Shapiro reaction was used in the Nicolaou ...

  4. Rudin–Shapiro sequence - Wikipedia

    en.wikipedia.org/wiki/Rudin–Shapiro_sequence

    Thus u 108 = u 13 + 1 = u 3 + 1 = u 1 + 2 = u 0 + 2 = 2, which can be verified by observing that the binary representation of 108, which is 1101100, contains two sub-strings 11. And so r 108 = (−1) 2 = +1. A 2-uniform morphism that requires a coding to generate the Rudin-Shapiro sequence is the following:

  5. HCPCS Level 2 - Wikipedia

    en.wikipedia.org/wiki/HCPCS_Level_2

    HCPCS Level 2. HCPCS Level II codes are alphanumeric medical procedure codes, primarily for non-physician services such as ambulance services and prosthetic devices,. [1] They represent items, supplies and non-physician services not covered by CPT-4 codes (Level I). Level II codes are composed of a single letter in the range A to V, followed by ...

  6. Stewart Shapiro - Wikipedia

    en.wikipedia.org/wiki/Stewart_Shapiro

    Stewart Shapiro (/ ʃ ə ˈ p ɪər oʊ /; born 1951) is O'Donnell Professor of Philosophy at the Ohio State University and distinguished visiting professor at the University of Connecticut. He is a figure in the philosophy of mathematics where he defends the abstract variety of structuralism .

  7. Coupon collector's problem - Wikipedia

    en.wikipedia.org/wiki/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 given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...