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In mathematics, a functional calculus is a theory allowing one to apply mathematical functions to mathematical operators.It is now a branch (more accurately, several related areas) of the field of functional analysis, connected with spectral theory.
Figure 1. A monotonically non-decreasing function Figure 2. A monotonically non-increasing function Figure 3. A function that is not monotonic. In mathematics, a monotonic function (or monotone function) is a function between ordered sets that preserves or reverses the given order.
In mathematics education, calculus is an abbreviation of both infinitesimal calculus and integral calculus, which denotes courses of elementary mathematical analysis.. In Latin, the word calculus means “small pebble”, (the diminutive of calx, meaning "stone"), a meaning which still persists in medicine.
In computational number theory, the index calculus algorithm is a probabilistic algorithm for computing discrete logarithms.Dedicated to the discrete logarithm in (/) where is a prime, index calculus leads to a family of algorithms adapted to finite fields and to some families of elliptic curves.
The raison d'être of the relational calculus is the formalization of query optimization.Query optimization consists in determining from a query the most efficient manner (or manners) to execute it.