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What does the symbol [=] mean?

  1. Oct 14, 2016 #1
    1. The problem statement, all variables and given/known data

    What does the symbol [=] mean?

    2. Relevant equations

    3. The attempt at a solution

    I tried looking this up online but can't find anything. I think it has something to do with dimensional analysis or denoting the units of a quantity. E.g., is it valid to write:

    t [=] seconds

  2. jcsd
  3. Oct 14, 2016 #2


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    Could you provide some context or a few examples?
    As long as the brackets are meant to belong to the sign, I have never seen this before. It might well be, that it denotes a dimension, as it would be in, e.g. ##[\vec{p}] = MLT^{-1}## (mass length / time) for momentum. A notation I've seen before. But I don't think it is in general use. And I can't see how ##t[=] \text{ seconds }## would make sense. Eventually ##[t] = \text{ seconds }##.
  4. Oct 15, 2016 #3


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    Google can't find [=] anywhere so very unlikely it exists.
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