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Terminology Question

  1. Jan 2, 2012 #1
    The chapter I am reading is on proving limits.... The terms "δ = min(δ1,δ2)" has came up a few times but what does it mean?

    My guess is that the distances δ1 and δ2 are some where in the interval of the distance δ about some x value.
    Last edited: Jan 2, 2012
  2. jcsd
  3. Jan 2, 2012 #2

    Ray Vickson

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    Typically, min(δ1,δ2) means the smaller of δ1 and δ2, or at least it does in most books and papers. Does your source really not have a glossary of notation?

  4. Jan 2, 2012 #3
    Ok it says the min of two numbers x and y is denoted min(x,y).. so Im guessing what I posted above that "min(δ1,δ2)" means δ1= δ if δ1<δ2 and vise versa. is that right?
  5. Jan 3, 2012 #4


    Staff: Mentor

    It's the other way around.

    δ = δ1 if δ1 is the smaller of the two numbers, and

    δ = δ2 if δ2 is the smaller of the two numbers.

    If δ1 = δ2, then set δ to either number.
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