The Irish logarithm was a system of number manipulation invented by Percy Ludgate for machine multiplication. The system used a combination of mechanical...

given real numbers a {\displaystyle a} and b {\displaystyle b} , the logarithm log b ⁡ ( a ) {\displaystyle \log _{b}(a)} is a number x {\displaystyle...

Irish inventions and discoveries are objects, processes or techniques which owe their existence either partially or entirely to an Irish person. Often...

^{5}.} Gaussian logarithm Irish logarithm, a similar technique derived empirically by Percy Ludgate Finite field arithmetic Logarithm table Zech, Julius...

but employing unique, discrete "Logarithmic Indexes" (now known as Irish logarithms), as well as a novel memory system utilizing concentric cylinders,...

Ludgate's engine used multiplication as its basis (using his own discrete Irish logarithms), had the first multiplier-accumulator (MAC), was first to exploit...

calculated with an abacus. Logarithm tables can be used to divide two numbers, by subtracting the two numbers' logarithms, then looking up the antilogarithm...

mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry. It is one of the simplest analog computers. Slide rules...

unmodified power and logarithm identities, particularly when naïvely treated as single-valued functions; see failure of power and logarithm identities. For...

definition of the constant e {\displaystyle e} , the base of the natural logarithm, now known as Euler's number. Euler made contributions to applied mathematics...

{\mathbf {v} }{\|\mathbf {v} \|}}\sin \|\mathbf {v} \|\right),} and the logarithm is ln ⁡ ( q ) = ln ⁡ ‖ q ‖ + v ‖ v ‖ arccos ⁡ a ‖ q ‖ . {\displaystyle...

Model 366 slide rules remain, with only five known to have survived. Irish logarithms, a similar scheme intended for use in a mechanical calculation machine...

mathematical notation for logarithms. All instances of log(x) without a subscript base should be interpreted as a natural logarithm, also commonly written...

Man). The Irish grid reference system is a similar system created by the Ordnance Survey of Ireland and the Ordnance Survey of Northern Ireland for the...

March 27, 2015. Maslin, Janet (December 5, 1997). "Good Will Hunting: Logarithms and Biorhythms Test a Young Janitor". The New York Times. Archived from...

development of most major branches of science. John Napier introduced logarithms in the early 17th century as a means to simplify calculations. Michael...

t_{1/2}={\frac {\ln(2)}{\lambda }}=\tau \ln(2)} where ln(2) is the natural logarithm of 2 (approximately 0.693).: 112  In chemical kinetics, the value of the...

Diophantine equations. He approximated partial sums of the harmonic series by logarithms (a precursor to Euler's summation formula) and was the first to use power...

English mathematician and Anglican clergyman. After John Napier discovered logarithms and Edmund Gunter created the logarithmic scales (lines, or rules) upon...

one-third weighting). Standard of living, as indicated by the natural logarithm of gross domestic product per capita at purchasing power parity. This...

Maslin, Janet (December 5, 1997). "Good Will Hunting (1997) Film Review; Logarithms and Biorhythms Test a Young Janitor". The New York Times. Archived from...

maker of scientific instruments, astronomer, and independent inventor of logarithms MPC · 2481 2482 Perkin 1980 CO Richard S. and Gladys T. Perkin of Perkin-Elmer...

is tedious and error-prone. Common logarithms were invented to simplify such calculations, since adding logarithms is equivalent to multiplying. The slide...

sitting in his rooms in the Analytical Society looking at a table of logarithms, which he knew to be full of mistakes, when the idea occurred to him of...

integral function, log ⁡ ( x ) {\displaystyle \log(x)} is the natural logarithm of x, and big O notation is used here. It is already known that 1/2 ≤ β ≤ 1...

Retrieved April 28, 2020. Maslin, Janet (December 5, 1997). "FILM REVIEW; Logarithms and Biorhythms Test a Young Janitor". The New York Times. ISSN 0362-4331...

produced figures in science and engineering. John Napier, inventor of logarithms, was born in Merchiston Tower and lived and died in the city. His house...

evaluation of the logarithm in the last step to be avoided in most cases. These steps can be greatly improved so that the logarithm is rarely evaluated...

Bradwardine expressed this by a series of specific examples, but although the logarithm had not yet been conceived, we can express his conclusion anachronistically...

where goldsmiths made French money to pay for tobacco. That triggered logarithms and slide rules made by clock makers, who also made pressure cookers that...