Linear algebra with proofs/vector space

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SUMMARY

The discussion focuses on proving that the set S of continuous real-valued functions f(x), where f(x)=0 if |x|≥ 1, is a vector space over the real numbers R. Participants emphasize the necessity of verifying all vector space axioms (VS1 to VS8) to establish S as a vector space. The initial attempt highlights the confusion regarding the application of these axioms to the functions in S, particularly in demonstrating that properties like commutativity (VS1) and associativity (VS2) hold true for the functions involved.

PREREQUISITES
  • Understanding of vector space axioms (VS1 to VS8)
  • Knowledge of continuous real-valued functions
  • Familiarity with the concept of function addition and scalar multiplication
  • Basic principles of mathematical proofs
NEXT STEPS
  • Review the properties of continuous functions in relation to vector spaces
  • Study the implications of each vector space axiom on function sets
  • Explore examples of vector spaces in functional analysis
  • Practice proving vector space properties with different function sets
USEFUL FOR

Students studying linear algebra, mathematicians interested in functional analysis, and educators teaching vector space concepts.

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Homework Statement



Suppose S denotes the set of continuous real-valued functions of a single variable f(x) having the property that f(x)=0 if |x|≥ 1. Show that S is a vector space over R by explicitly checking all the axioms.


Homework Equations



(VS1) For all x, y in V, x+y=y+x
(VS2) For all x, y, z in V, (x+y)+z=x+(y+z)
(VS3) There exists an element in V denoted by 0 such that x+0=x for each x in V
(VS4) For each element x in V there exists an element y in V such that x+y=0
(VS5) For each element x in V, 1x=x
(VS6) For each pair of elements a, b in F and each element x in V, (ab)x=a(bx)
(VS7) For each element a in F and each pair of elements x, y in V, a(x+y)=ax+ay
(VS8) For each pair of elements a, b in F and each element x in V, (a+b)x=ax+bx


The Attempt at a Solution



no real attempt yet. i am very lost on what i am supposed to do. all i really know is that I'm supposed to test S for each of those VS rules, and if they satisfy all of them, then S is a vector space over R. I'm just confused on how i am supposed to go about it.
 
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Well, your vector space is S and your vectors are f(x),f(y),... so if (VS1) holds for S, then f(x)+f(y)=f(y)+f(x) which is clearly true for all real valued functions... do f(x),f(y)... satisfy VS2,VS3,...?
 

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