Arithmetical complement of a logarithm
Logarithm Log"a*rithm (l[o^]g"[.a]*r[i^][th]'m), n. [Gr. lo`gos word, account, proportion + 'ariqmo`s number: cf. F. logarithme.] (Math.) One of a class of auxiliary numbers, devised by John Napier, of Merchiston, Scotland (1550-1617), to abridge arithmetical calculations, by the use of addition and subtraction in place of multiplication and division.

Note: The relation of logarithms to common numbers is that of numbers in an arithmetical series to corresponding numbers in a geometrical series, so that sums and differences of the former indicate respectively products and quotients of the latter; thus, 0 1 2 3 4 Indices or logarithms 1 10 100 1000 10,000 Numbers in geometrical progression Hence, the logarithm of any given number is the exponent of a power to which another given invariable number, called the base, must be raised in order to produce that given number. Thus, let 10 be the base, then 2 is the logarithm of 100, because 10^{2} = 100, and 3 is the logarithm of 1,000, because 10^{3} = 1,000. [1913 Webster]

{Arithmetical complement of a logarithm}, the difference between a logarithm and the number ten.

{Binary logarithms}. See under {Binary}.

{Common logarithms}, or {Brigg's logarithms}, logarithms of which the base is 10; -- so called from Henry Briggs, who invented them.

{Gauss's logarithms}, tables of logarithms constructed for facilitating the operation of finding the logarithm of the sum of difference of two quantities from the logarithms of the quantities, one entry of those tables and two additions or subtractions answering the purpose of three entries of the common tables and one addition or subtraction. They were suggested by the celebrated German mathematician Karl Friedrich Gauss (died in 1855), and are of great service in many astronomical computations.

{Hyperbolic logarithm} or {Napierian logarithm} or {Natural logarithm}, a logarithm (devised by John Speidell, 1619) of which the base is e (2.718281828459045...); -- so called from Napier, the inventor of logarithms.

{Logistic logarithms} or {Proportional logarithms}, See under {Logistic}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Arithmetical complement of a logarithm — Arithmetical Ar ith*met ic*al, a. Of or pertaining to arithmetic; according to the rules or method of arithmetic. [1913 Webster] {Arithmetical complement of a logarithm}. See {Logarithm}. {Arithmetical mean}. See {Mean}. {Arithmetical… …   The Collaborative International Dictionary of English

  • Arithmetical compliment of a logarithm — Complement Com ple*ment, n. [L. complementun: cf. F. compl[ e]ment. See {Complete}, v. t., and cf. {Compliment}.] 1. That which fills up or completes; the quantity or number required to fill a thing or make it complete. [1913 Webster] 2. That… …   The Collaborative International Dictionary of English

  • Arithmetical complement of a number — Complement Com ple*ment, n. [L. complementun: cf. F. compl[ e]ment. See {Complete}, v. t., and cf. {Compliment}.] 1. That which fills up or completes; the quantity or number required to fill a thing or make it complete. [1913 Webster] 2. That… …   The Collaborative International Dictionary of English

  • Complement of a parallelogram — Complement Com ple*ment, n. [L. complementun: cf. F. compl[ e]ment. See {Complete}, v. t., and cf. {Compliment}.] 1. That which fills up or completes; the quantity or number required to fill a thing or make it complete. [1913 Webster] 2. That… …   The Collaborative International Dictionary of English

  • Complement of an angle — Complement Com ple*ment, n. [L. complementun: cf. F. compl[ e]ment. See {Complete}, v. t., and cf. {Compliment}.] 1. That which fills up or completes; the quantity or number required to fill a thing or make it complete. [1913 Webster] 2. That… …   The Collaborative International Dictionary of English

  • Complement of an arc — Complement Com ple*ment, n. [L. complementun: cf. F. compl[ e]ment. See {Complete}, v. t., and cf. {Compliment}.] 1. That which fills up or completes; the quantity or number required to fill a thing or make it complete. [1913 Webster] 2. That… …   The Collaborative International Dictionary of English

  • Logarithm — Log a*rithm (l[o^]g [.a]*r[i^][th] m), n. [Gr. lo gos word, account, proportion + ariqmo s number: cf. F. logarithme.] (Math.) One of a class of auxiliary numbers, devised by John Napier, of Merchiston, Scotland (1550 1617), to abridge… …   The Collaborative International Dictionary of English

  • Arithmetical — Ar ith*met ic*al, a. Of or pertaining to arithmetic; according to the rules or method of arithmetic. [1913 Webster] {Arithmetical complement of a logarithm}. See {Logarithm}. {Arithmetical mean}. See {Mean}. {Arithmetical progression}. See… …   The Collaborative International Dictionary of English

  • Arithmetical mean — Arithmetical Ar ith*met ic*al, a. Of or pertaining to arithmetic; according to the rules or method of arithmetic. [1913 Webster] {Arithmetical complement of a logarithm}. See {Logarithm}. {Arithmetical mean}. See {Mean}. {Arithmetical… …   The Collaborative International Dictionary of English

  • Arithmetical progression — Arithmetical Ar ith*met ic*al, a. Of or pertaining to arithmetic; according to the rules or method of arithmetic. [1913 Webster] {Arithmetical complement of a logarithm}. See {Logarithm}. {Arithmetical mean}. See {Mean}. {Arithmetical… …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”