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Products of function equivalence classes

  1. Oct 16, 2011 #1
    1. The problem statement, all variables and given/known data

    If f ∈ C(R) with f(0) ≠ 0, show that there exisits a g ∈ C(R) such that [fg] = [1], where [1] denotes the equivalence class containing the constant function 1.

    2. Relevant equations

    3. The attempt at a solution
    Let f ∈ C(R) such that f:R → R is defined as f(x) = 1/x and let g ∈ C(R) such that g:R → R is defined as g(x) = x. Therefore [fg] = [x/x] = [1] for all x∈R.

    is this correct?
  2. jcsd
  3. Oct 17, 2011 #2


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    Science Advisor

    "The equivalence class containing the constant function 1" with what equivalence relation?
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