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What (who) is discrete$21801$ - definition

PROBLEM OF INVERTING EXPONENTIATION IN FINITE GROUPS

Discrete log problem; Discrete logarithm problem; Discrete logarithms; Discrete log; GDLP; Generalized discrete logarithm problem; Discrete Logarithm; Discrete Log; Discrete logorithm; Discrete logarithm assumption; DLOG; Discrete logarithm cryptography; Discrete Logarithm Problem (DLP); Discrete Logarithm Problem; Index (number theory)

Discrete Laplace operator

ANALOG OF THE CONTINUOUS LAPLACE OPERATO

Discrete Schrödinger operator; Discrete Green's function; Discrete laplace operator; Discrete Schrodinger operator; Discrete Schroedinger operator; Discrete Laplacian operator; Laplace filter

In mathematics, the discrete Laplace operator is an analog of the continuous Laplace operator, defined so that it has meaning on a graph or a discrete grid. For the case of a finite-dimensional graph (having a finite number of edges and vertices), the discrete Laplace operator is more commonly called the Laplacian matrix.

https://en.wikipedia.org/wiki/Discrete_Laplace_operator

Discrete group

DISCRETE SUBGROUP OF A TOPOLOGICAL GROUP G IS A SUBGROUP H SUCH THAT THERE IS AN OPEN COVER OF H IN WHICH EVERY OPEN SUBSET CONTAINS EXACTLY ONE ELEMENT OF H; IN OTHER WORDS, THE SUBSPACE TOPOLOGY OF H IN G IS THE DISCRETE TOPOLOGY

Discrete subgroup; Discrete group theory

In mathematics, a topological group like G is called a discrete group if there is no limit point in it (i.e.

https://en.wikipedia.org/wiki/Discrete_group

Discrete choice

CHOICE AMONG TWO OR MORE DISCRETE ALTERNATIVES

Discrete choice model; Discrete choice analysis; Discrete Choice; Discrete Choice Models; Binary choice model; Binary choice; Qualitative response models; Nested logit; Conditional logit; Exploded logit

In economics, discrete choice models, or qualitative choice models, describe, explain, and predict choices between two or more discrete alternatives, such as entering or not entering the labor market, or choosing between modes of transport. Such choices contrast with standard consumption models in which the quantity of each good consumed is assumed to be a continuous variable.

https://en.wikipedia.org/wiki/Discrete_choice

Wikipedia

Discrete logarithm

In mathematics, for given real numbers a and b, the logarithm log_b a is a number x such that b^x = a. Analogously, in any group G, powers b^k can be defined for all integers k, and the discrete logarithm log_b a is an integer k such that b^k = a. In number theory, the more commonly used term is index: we can write x = ind_r a (mod m) (read "the index of a to the base r modulo m") for r^x ≡ a (mod m) if r is a primitive root of m and gcd(a,m) = 1.

Discrete logarithms are quickly computable in a few special cases. However, no efficient method is known for computing them in general. Several important algorithms in public-key cryptography, such as ElGamal base their security on the assumption that the discrete logarithm problem over carefully chosen groups has no efficient solution.

https://en.wikipedia.org/wiki/Discrete logarithm