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https://math.stackexchange.com/questions/465216/space-of-continuous-functions-with-compact-support-dense-in-space-of-continuous
How can we prove that the space of continuous functions with compact support is dense in the space of continuous functions that vanish at infinity? Stack Exchange Network Stack Exchange network consists of 175 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge ...
https://www.researchgate.net/publication/259260858_Continuous_functions_with_compact_support
Continuous functions with compact support 107 (4) M is Hausdorff, if and only if, for every pair of distinct maximal ideals M and N of K there exist points a, b ∈ K such that a 6∈ M , b 6∈ N
https://math.stackexchange.com/questions/126797/completeness-of-continuous-real-valued-functions-with-compact-support
How can I show that the space of continuous real valued functions on R with compact support in the usual sup norm metric is not complete ? I know that this result can be proved by using the fact that the given space is dense in the space of all continuous functions that vanish at infinity which is complete , but I want a bit easier proof of this as I have not studied measure theory .
https://www.planetmath.org/CompactlySupportedContinuousFunctionsAreDenseInLp
Now, it follows easily that any simple function ∑ i = 1 n c i χ A i, where each A i has finite measure, can also be approximated by a compactly supported continuous function. Since this kind of simple functions are dense in L p (X) we see that C c (X) is also dense in L p (X).
http://www.ams.org/journals/tran/1971-156-00/S0002-9947-1971-0275367-4/S0002-9947-1971-0275367-4.pdf
1. Introduction. The support of a real continuous function / on a topological space A" is the closure of the set of points in Afat which/does not vanish. Gillman and Jerison have shown that when A'is a realcompact space, the functions in C(X) with compact support are precisely the functions which belong to every free maximal ideal in C(X).
http://www-users.math.umn.edu/~garrett/m/fun/notes_2016-17/examples.pdf
Paul Garrett: Examples of function spaces (February 11, 2017) converges in sup-norm, the partial sums have compact support, but the whole does not have compact support. [2.1] Claim: The completion of the space Co c (R) of compactly-supported continuous functions in the metric given by the sup-norm jfj Co = sup x2R jf(x)jis the space C o
https://en.wikipedia.org/wiki/Function_space
In mathematics, a function space is a set of functions between two fixed sets. Often, the domain and/or codomain will have additional structure which is inherited by the function space. For example, the set of functions from any set X into a vector space has a natural vector space structure given by pointwise addition and scalar multiplication. In other scenarios, the function space might ...
https://en.wikipedia.org/wiki/Compact_support
Every continuous function on a compact topological space has compact support since every closed subset of a compact space is indeed compact. Essential support [ edit ] If X is a topological measure space with a Borel measure μ (such as R n , or a Lebesgue measurable subset of R n , equipped with Lebesgue measure), then one typically identifies ...
https://www.math.ucdavis.edu/~hunter/m201a_16/continuous.pdf
4 Continuous functions on compact sets De nition 20. A function f : X !Y is uniformly continuous if for ev-ery >0 there exists >0 such that if x;y2X and d(x;y) < , then d(f(x);f(y)) < . Theorem 21. A continuous function on a compact metric space is bounded and uniformly continuous. Proof. If Xis a compact metric space and f: X!Y a continuous ...
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