take a logarithm

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• Logarithm — The graph of the logarithm to base 2 crosses the x axis (horizontal axis) at 1 and passes through the points with coordinates (2, 1), (4, 2), and (8, 3) …   Wikipedia

• Logarithm of a matrix — In mathematics, a logarithm of a matrix is another matrix such that the matrix exponential of the latter matrix equals the original matrix. It is thus a generalization of the scalar logarithm and in some sense an inverse function of the matrix… …   Wikipedia

• Natural logarithm — Base e redirects here. For the numbering system which uses e as its base, see Non integer representation#Base e. Graph of the natural logarithm function. The function slowly grows to positive infinity as x increases and rapidly goes to negative… …   Wikipedia

• Indefinite logarithm — The indefinite logarithm of a positive number n (variously denoted [log n] , mathrm{Log}(n) or even sometimes just log n) is the logarithm without regard to any particular base: it is a function (of the base), not a number . This is as opposed to …   Wikipedia

• Discrete logarithm — In mathematics, specifically in abstract algebra and its applications, discrete logarithms are group theoretic analogues of ordinary logarithms. In particular, an ordinary logarithm loga(b) is a solution of the equation ax = b over the… …   Wikipedia

• Mathematical fallacy — In mathematics, certain kinds of mistakes in proof, calculation, or derivation are often exhibited, and sometimes collected, as illustrations of the concept of mathematical fallacy. The specimens of the greatest interest can be seen as… …   Wikipedia

• Invalid proof — In mathematics, there are a variety of spurious proofs of obvious contradictions. Although the proofs are flawed, the errors, usually by design, are comparatively subtle. These fallacies are normally regarded as mere curiosities, but can be used… …   Wikipedia

• Acid dissociation constant — Acetic acid, a weak acid, donates a proton (hydrogen ion, high …   Wikipedia

• Okamoto–Uchiyama cryptosystem — The Okamoto–Uchiyama cryptosystem was discovered in 1998 by T. Okamoto and S. Uchiyama. The system works in the group , where n is of the form p2q and p and q are large primes. Contents 1 Scheme definition 1.1 Key generation …   Wikipedia

• Okamoto-Uchiyama cryptosystem — The Okamoto Uchiyama Cryptosystem was discovered in 1998 by T. Okamoto and S. Uchiyama. The system works in the group (mathbb{Z}/nmathbb{Z})^*, where n is of the form p 2 q . The Okamoto Uchiyama cryptosystem is a precursor to the Paillier… …   Wikipedia

• Prosthaphaeresis — was an algorithm used in the late 16th century and early 17th century for approximate multiplication and division using formulas from trigonometry. For the 25 years preceding the invention of the logarithm in 1614, it was the only known generally …   Wikipedia