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31: 3.1 Arithmetics and Error Measures
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§3.1(i) Floating-Point Arithmetic
… ► ►The set of machine numbers is the union of and the set … ►Let be any positive number with … ►Negative numbers are rounded in the same way as . …32: 23.20 Mathematical Applications
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►Given , calculate , , by doubling as above.
…If any of , , is not an integer, then the point has infinite order.
Otherwise observe any equalities between , , , , and their negatives.
The order of a point (if finite and not already determined) can have only the values 3, 5, 6, 7, 9, 10, or 12, and so can be found from , , , , , , or .
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§23.20(v) Modular Functions and Number Theory
…33: 27.18 Methods of Computation: Primes
§27.18 Methods of Computation: Primes
►An overview of methods for precise counting of the number of primes not exceeding an arbitrary integer is given in Crandall and Pomerance (2005, §3.7). …An analytic approach using a contour integral of the Riemann zeta function (§25.2(i)) is discussed in Borwein et al. (2000). … ►These algorithms are used for testing primality of Mersenne numbers, , and Fermat numbers, . …34: 26.11 Integer Partitions: Compositions
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denotes the number of compositions of , and is the number of compositions into exactly
parts.
is the number of compositions of with no 1’s, where again .
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26.11.1
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►The Fibonacci numbers are determined recursively by
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►Additional information on Fibonacci numbers can be found in Rosen et al. (2000, pp. 140–145).
35: 13.9 Zeros
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§13.9(i) Zeros of
… ►When the number of real zeros is finite. Let be the number of positive zeros. …The number of negative real zeros is given by … ►§13.9(ii) Zeros of
…36: 26.2 Basic Definitions
37: 26.12 Plane Partitions
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►Then the number of plane partitions in is
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►The number of symmetric plane partitions in is
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►The number of cyclically symmetric plane partitions in is
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►The number of descending plane partitions in is
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38: 24.8 Series Expansions
39: DLMF Project News
error generating summary40: 26.4 Lattice Paths: Multinomial Coefficients and Set Partitions
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is the number of ways of placing distinct objects into labeled boxes so that there are objects in the th box.
It is also the number of -dimensional lattice paths from to .
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is the number of permutations of with cycles of length 1, cycles of length 2, , and cycles of length :
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26.4.7
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is the number of set partitions of with subsets of size 1, subsets of size 2, , and subsets of size :
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