In nonstandard analysis, a field of mathematics, the increment theorem states the following: Suppose a function y = f(x) is differentiable at x and that Δx is infinitesimal. Then
for some infinitesimal ε, where
If then we may write
which implies that , or in other words that is infinitely close to , or is the standard part of .
A similar theorem exists in standard Calculus. Again assume that y = f(x) is differentiable, but now let Δx be a nonzero standard real number. Then the same equation
holds with the same definition of Δy, but instead of ε being infinitesimal, we have
(treating x and f as given so that ε is a function of Δx alone).
In nonstandard analysis, a field of mathematics, the incrementtheorem states the following: Suppose a function y = f(x) is differentiable at x and that...
for his Fermat's principle for light propagation and his Fermat's Last Theorem in number theory, which he described in a note at the margin of a copy...
Individual concepts Standard part function Transfer principle Hyperinteger Incrementtheorem Monad Internal set Levi-Civita field Hyperfinite set Law of continuity...
curves. These two branches are related to each other by the fundamental theorem of calculus. They make use of the fundamental notions of convergence of...
properties of this function, he generalized Fermat's little theorem to what is now known as Euler's theorem. He contributed significantly to the theory of perfect...
known as the method of indivisibles in his work The Method of Mechanical Theorems to find areas of regions and volumes of solids. In his formal published...
and constitute a separate theorem. Bajnok, Béla (2013). An Invitation to Abstract Mathematics. ISBN 9781461466369. Theorem 24.29. The surreal number system...
Individual concepts Standard part function Transfer principle Hyperinteger Incrementtheorem Monad Internal set Levi-Civita field Hyperfinite set Law of continuity...
Kamae's proof of the individual ergodic theorem or L. van den Dries and Alex Wilkie's treatment of Gromov's theorem on groups of polynomial growth. Nonstandard...
Pappus's centroid theorem (Also known as the Guldinus theorem, Pappus–Guldinus theorem or Pappus's theorem) is either of two related theorems dealing with...
Robinson's approach, a short proof of the intermediate value theorem (Bolzano's theorem) using infinitesimals is done by the following. Let f be a continuous...
certain Point on the Supposition of an Increment, and then at once shifting your Supposition to that of no Increment . . . Since if this second Supposition...
mathematical measure theory, for every positive integer n the ham sandwich theorem states that given n measurable "objects" in n-dimensional Euclidean space...
The Method of Mechanical Theorems (Greek: Περὶ μηχανικῶν θεωρημάτων πρὸς Ἐρατοσθένη ἔφοδος), also referred to as The Method, is one of the major surviving...
H} . The transfer principle for ultrapowers is a consequence of Łoś's theorem of 1955. Concerns about the soundness of arguments involving infinitesimals...
relation of integration and differentiation, later called the fundamental theorem of calculus, by means of a figure in his 1693 paper Supplementum geometriae...
having decimal representations, prime factorizations, etc. Every classical theorem that applies to the natural numbers applies to the nonstandard natural...
In vector calculus, the divergence theorem, also known as Gauss's theorem or Ostrogradsky's theorem, is a theorem relating the flux of a vector field through...
continuity theorem is a theorem that guarantees that a stochastic process that satisfies certain constraints on the moments of its increments will be continuous...
Individual concepts Standard part function Transfer principle Hyperinteger Incrementtheorem Monad Internal set Levi-Civita field Hyperfinite set Law of continuity...
In mathematical analysis, the intermediate value theorem states that if f {\displaystyle f} is a continuous function whose domain contains the interval...
sentences of [the theory] are interpreted in *R in Henkin's sense. The theorem to the effect that each proposition valid over R, is also valid over *R...