Cayley identity for Schwarzian derivatives
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21: 19.12 Asymptotic Approximations
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22: 27.16 Cryptography
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►Thus, and .
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►By the Euler–Fermat theorem (27.2.8), ; hence .
But , so is the same as modulo .
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23: 16.3 Derivatives and Contiguous Functions
§16.3 Derivatives and Contiguous Functions
►§16.3(i) Differentiation Formulas
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16.3.1
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►Other versions of these identities can be constructed with the aid of the operator identity
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16.3.5
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24: 25.4 Reflection Formulas
25: 1.4 Calculus of One Variable
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§1.4(iii) Derivatives
… ►Higher Derivatives
… ►Chain Rule
… ►Leibniz’s Formula
… ►L’Hôpital’s Rule
…26: 1.2 Elementary Algebra
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►and is the -th derivative of (§1.4(iii)).
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►The identity matrix
, is defined as
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1.2.53
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1.2.71
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►The diagonal elements are not necessarily distinct, and the number of identical (degenerate) diagonal elements is the multiplicity of that specific eigenvalue.
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27: 18.9 Recurrence Relations and Derivatives
28: 36.9 Integral Identities
29: 35.7 Gaussian Hypergeometric Function of Matrix Argument
30: 18.2 General Orthogonal Polynomials
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►If the orthogonality discrete set is or , then the role of the differentiation operator in the case of classical OP’s (§18.3) is played by , the forward-difference operator, or by , the backward-difference operator; compare §18.1(i).
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►The constant function will often, but not always, be identically
(see, for example, (18.2.11_8)), in all cases, by convention, as indicated in §18.1(i).
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►As in §18.1(i) we assume that .
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►The operator is a delta operator, i.
…, commutes with translation in the variable and is a nonzero constant.
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