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Homework Help: Topology notation question

  1. Oct 8, 2007 #1
    1. The problem statement, all variables and given/known data
    I saw the following statement in a proof that a second countable normal space is homeomorphic to the Hilbert cube:

    [tex] n = (B_i, B_j) [/tex]

    where the = sign is replaced with an approximately equals which I do not know how to make in latex

    B_i and B_j are basis sets s.t. B_i closure is a subset of B_j

    n is a natural number

    Anybody know what the the approximately equal sign means (they already defined what the ordered pair was)?

    2. Relevant equations

    3. The attempt at a solution
    Last edited: Oct 8, 2007
  2. jcsd
  3. Oct 8, 2007 #2

    matt grime

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    \sim is what you might want.
  4. Oct 8, 2007 #3


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    Where did you see this? Can you give us a link, or book & page number?

    By the way, you probably meant to say "homeomorphic to a subspace of the Hilbert cube".
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