Search results
Results from the WOW.Com Content Network
The logarithmic derivative is then / and one can draw the general conclusion that for f meromorphic, the singularities of the logarithmic derivative of f are all simple poles, with residue n from a zero of order n, residue −n from a pole of order n. See argument principle. This information is often exploited in contour integration.
In calculus, logarithmic differentiation or differentiation by taking logarithms is a method used to differentiate functions by employing the logarithmic derivative of a function f, [1] () ′ = ′ ′ = () ′.
Logarithmic differentiation is a technique which uses logarithms and its differentiation rules to simplify certain expressions before actually applying the derivative. [citation needed] Logarithms can be used to remove exponents, convert products into sums, and convert division into subtraction — each of which may lead to a simplified ...
The natural logarithm has the number e ≈ 2.718 as its base; its use is widespread in mathematics and physics because of its very simple derivative. The binary logarithm uses base 2 and is frequently used in computer science. Logarithms were introduced by John Napier in 1614 as a means of simplifying calculations. [1]
The natural logarithm of a positive real number may also be defined as the derivative of the function = at = (assuming has been previously defined without using the natural logarithm). Using the definition of the derivative as a limit, this definition may be written as ln ( a ) = lim x → 0 a x − 1 x . {\displaystyle \ln(a)=\lim _{x\to 0 ...
In mathematics, the digamma function is defined as the logarithmic derivative of the gamma function: [1] [2] [3] ... From the definition of ...
Logarithms can be used to make calculations easier. For example, two numbers can be multiplied just by using a logarithm table and adding. These are often known as logarithmic properties, which are documented in the table below. [2] The first three operations below assume that x = b c and/or y = b d, so that log b (x) = c and log b (y) = d.
In algebraic geometry and the theory of complex manifolds, a logarithmic differential form is a differential form with poles of a certain kind. The concept was introduced by Pierre Deligne . [ 1 ] In short, logarithmic differentials have the mildest possible singularities needed in order to give information about an open submanifold (the ...