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shift theorem

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  • Shift theorem — In mathematics, the (exponential) shift theorem is a theorem about polynomial differential operators ( D operators) and exponential functions. It permits one to eliminate, in certain cases, the exponential from under the D operators. The theorem… …   Wikipedia

  • Shift matrix — In mathematics, a shift matrix is a binary matrix with ones only on the superdiagonal or subdiagonal, and zeroes elsewhere. A shift matrix U with ones on the superdiagonal is an upper shift matrix.The alternative subdiagonal matrix L is… …   Wikipedia

  • Curtis–Hedlund–Lyndon theorem — The Curtis–Hedlund–Lyndon theorem is a mathematical characterization of cellular automata in terms of their symbolic dynamics. It is named after Morton L. Curtis, Gustav A. Hedlund, and Roger Lyndon; in his 1969 paper stating the theorem, Hedlund …   Wikipedia

  • Rybczynski theorem — The Rybczynski theorem was developed in 1955 by the Polish born English economist Tadeusz Rybczynski (1923 1998). The theorem states: At constant relative goods prices, a rise in the endowment of one factor will lead to a more than proportional… …   Wikipedia

  • Central limit theorem — This figure demonstrates the central limit theorem. The sample means are generated using a random number generator, which draws numbers between 1 and 100 from a uniform probability distribution. It illustrates that increasing sample sizes result… …   Wikipedia

  • Very minimum-shift keying — VMSK, for Very Minimum Shift Keying modulation, is one of several digital modulation methods claimed to send high speed digital data through very low bandwidth (or narrowband) channels. A typical claim is a data rate of 6 Mbit/s in a bandwidth of …   Wikipedia

  • Fuglede's theorem — In mathematics, Fuglede s theorem is a result in operator theory, named after Bent Fuglede. The result Theorem (Fuglede) Let T and N be bounded operators on a complex Hilbert space with N being normal. If TN = NT , then TN* = N*T .Colloquially,… …   Wikipedia

  • Crystallographic restriction theorem — The crystallographic restriction theorem in its basic form was based on the observation that the rotational symmetries of a crystal are usually limited to 2 fold, 3 fold, 4 fold, and 6 fold. However, quasicrystals can occur with other symmetries …   Wikipedia

  • Equidistribution theorem — In mathematics, the equidistribution theorem is the statement that the sequence : a , 2 a , 3 a , ... mod 1 is uniformly distributed on the unit interval, when a is an irrational number. It is a special case of the ergodic theorem.clarify… …   Wikipedia

  • Bochner's theorem — In mathematics, Bochner s theorem characterizes the Fourier transform of a positive finite Borel measure on the real line. Background Given a positive finite Borel measure μ on the real line R, the Fourier transform Q of μ is the continuous… …   Wikipedia

  • Alchian-Allen Theorem — The Alchian Allen Theorem was developed in 1964 by Armen Alchian and William R. Allen in the book University Economics (now called Exchange and Production [ cite book |author=Alchian, Armen Albert |title=Exchange production: competition,… …   Wikipedia

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