integer degree and order
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11: 31.8 Solutions via Quadratures
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►For half-odd-integer values of the exponent parameters:
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►Here is a polynomial of degree
in and of degree
in , that is a solution of the third-order differential equation satisfied by a product of any two solutions of Heun’s equation.
The degree
is given by
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►By automorphisms from §31.2(v), similar solutions also exist for , and may become a rational function in .
…The curve reflects the finite-gap property of Equation (31.2.1) when the exponent parameters satisfy (31.8.1) for .
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12: 14.24 Analytic Continuation
13: 14.18 Sums
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14.18.9
, , .
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14: 14.1 Special Notation
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, , | real variables. |
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, | unless stated otherwise, nonnegative integers, used for order and degree, respectively. |
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15: 18.2 General Orthogonal Polynomials
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►If the polynomials () are orthogonal on a finite set of distinct points as in (18.2.3), then the polynomial of degree
, up to a constant factor defined by (18.2.8) or (18.2.10), vanishes on .
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►The Hankel determinant
of order
is defined by and
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Degree lowering and raising differentiation formulas and structure relations
… ►If and are polynomials of degree independent of , and moreover is a polynomial independent of then … ►Polynomials of degree () are called Sheffer polynomials if they are generated by a generating function of the form …16: 14.9 Connection Formulas
17: 1.2 Elementary Algebra
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►Let be distinct constants, and be a polynomial of degree less than .
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►If are positive integers and , then there exist polynomials , , such that
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►Square matrices (said to be of order
) dominate the use of matrices in the DLMF, and they have many special properties.
Unless otherwise indicated, matrices are assumed square, of order
; and, when vectors are combined with them, these are of length .
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►The norm of an order
square matrix, , is
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18: 14.3 Definitions and Hypergeometric Representations
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►When () (14.3.2) is replaced by its limiting value; see Hobson (1931, §132) for details.
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14.3.6
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14.3.9
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14.3.11
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14.3.15
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19: 14.8 Behavior at Singularities
20: 18.30 Associated OP’s
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►The constant is usually taken as a positive integer.
However, if the recurrence coefficients are polynomial, or rational, functions of , polynomials of degree
may be well defined for provided that
Askey and Wimp (1984).
►The order
recurrence is initialized as
…The lowest order monic versions of both of these appear in §18.2(x), (18.2.31) defining the associated monic polynomials, and (18.2.32) their closely related cousins the corecursive polynomials.
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►The zeroth order corecursive monic polynomials
follow directly from the alternate initialization
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