By Keit Oldham, Jan Myland, Jerome Spanier (auth.)

This moment version of An Atlas of services, with Equator, the Atlas functionality Calculator, presents entire info on a number of hundred features or functionality households of curiosity to scientists, engineers and mathematicians who're all for the quantitative features in their box. starting with basic integer-valued services, the booklet progresses to polynomials, exponential, trigonometric, Bessel, and hypergeometric features, and lots of extra. The sixty five chapters are prepared approximately so as of accelerating complexity, mathematical sophistication being stored to a minimal whereas stressing software all through. as well as delivering definitions and easy homes for each functionality, every one bankruptcy catalogs extra complicated interrelationships in addition to the derivatives, integrals, Laplace transforms and different features of the functionality. quite a few colour figures in - or 3- dimensions depict their form and qualitative beneficial properties and flesh out the reader’s familiarity with the features. often, the bankruptcy concludes with a concise exposition on an issue in utilized arithmetic linked to the actual functionality or functionality family.

Features that make the Atlas a useful reference device, but easy to take advantage of, include:

full insurance of these functions—elementary and "special”—that meet daily needs

a standardized bankruptcy layout, making it effortless to find wanted details on such elements as: nomenclature, common habit, definitions, intrarelationships, expansions, approximations, limits, and reaction to operations of the calculus

extensive cross-referencing and entire indexing, with important appendices

the inclusion of leading edge software--Equator, the Atlas functionality Calculator

the inclusion of recent fabric facing attention-grabbing functions of the various functionality households, construction upon the favorable responses to related fabric within the first edition.

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**Additional resources for An Atlas of Functions: with Equator, the Atlas Function Calculator**

**Example text**

Note the very rapid increase in the absolute value |En| with increasing even n, which dictated the logarithmic presentation in the figure. B. 1007/978-0-387-48807-3_6, © Springer Science+Business Media, LLC 2009 45 THE EULER NUMBERS En 46 §E · 5 frac ¨ n ¸ © 10 ¹ 10 5:2:2 n 5:3 4,8,12, where frac denotes the fractional-value function [Chapter 8]. 5:3 DEFINITIONS The generating function f sech(t ) 5:3:1 ¦E n 0 tn n n! may be used to define the Euler numbers, though the summation is slow to converge for larger t values.

The pulse function may be represented by 1:13:1 ª § h· h ·º § c «u ¨ x a ¸ u ¨ x a ¸» 2¹ 2 ¹¼ © ¬ © in terms of the Heaviside function [Chapter 9]. The addition of a number of pulse functions, having various locations, heights, and widths, produces a function whose map consists of horizontal straight line segments. Such a function, known as a piecewise-constant function, may be used to approximate a more complicated or incompletely known function. It is the approximation recorded, for example, whenever a varying quantity is measured by a digital instrument.

The corresponding series with alternating signs sum similarly to exp(1) and to the particular value J0(2) of the zero-order Bessel function [Chapter 52]. There is even the intriguing asymptotic result [see equation 37:13:4] f f j 0 0 ¦ ( ) j j ! ~ ³ 0! 1! 2! 59634 73623 23194 Moreover, the series (1)n/(2n)! sums to cos(1) and there are several analogous summations. 2:6 EXPANSIONS Stirling’s formula [see also Section 43:6] 1 1 139 ª º n! ~ 2Sn exp( n) n n «1 » 2 3 ¬ 12n 288n 51840n ¼ 2:6:1 nof provides an expansion for the factorial function.