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In mathematical analysis, limit superior and limit inferior are important tools for studying sequences of real numbers.Since the supremum and infimum of an unbounded set of real numbers may not exist (the reals are not a complete lattice), it is convenient to consider sequences in the affinely extended real number system: we add the positive and negative infinities to the real line to give the ...
In mathematics, the limit of a sequence of sets,, … (subsets of a common set ) is a set whose elements are determined by the sequence in either of two equivalent ways: (1) by upper and lower bounds on the sequence that converge monotonically to the same set (analogous to convergence of real-valued sequences) and (2) by convergence of a sequence of indicator functions which are themselves ...
In these limits, the infinitesimal change is often denoted or .If () is differentiable at , (+) = ′ ().This is the definition of the derivative.All differentiation rules can also be reframed as rules involving limits.
The supremum (abbreviated sup; pl.: suprema) of a subset of a partially ordered set is the least element in that is greater than or equal to each element of , if such an element exists. [1] If the supremum of S {\displaystyle S} exists, it is unique, and if b is an upper bound of S {\displaystyle S} , then the supremum of S {\displaystyle S} is ...
Let f 1, f 2, ... denote a sequence of real-valued measurable functions defined on a measure space (S,Σ,μ).If there exists a Lebesgue-integrable function g on S which dominates the sequence in absolute value, meaning that |f n | ≤ g for all natural numbers n, then all f n as well as the limit inferior and the limit superior of the f n are integrable and
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The article did not place any restrictions on the ordering of X in its definitions of lim sup and lim inf. Without restrictions, these may not exist. I modified the section to acknowledge that they may not exist. I do not know if lim sup and lim inf are generally considered in sets other than complete lattices (in which they are guaranteed to ...