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I What δ means?

  1. Jul 19, 2016 #1
    Hello I have seen this symbol in many equations it looks like this:δΓ. I know that Γ means (that is Cristoffel symbol) but I don't know what δ means. Does anybody know?
  2. jcsd
  3. Jul 19, 2016 #2
    Differential of a path function is δ....Differential of a state function is d....
  4. Jul 19, 2016 #3
    [1] " In mathematics, the Kronecker delta (named after Leopold Kronecker) is a function of two variables, usually just positive integers. The function is 1 if the variables are equal, and 0 otherwise:
    δ i j = { 0 if i ≠ j , 1 if i = j . {\displaystyle \delta _{ij}={\begin{cases}0&{\text{if }}i\neq j,\\1&{\text{if }}i=j.\end{cases}}} https://wikimedia.org/api/rest_v1/media/math/render/svg/904297d67d13919327bab9243517aef32e96c550
    where the Kronecker delta δij is a piecewise function of variables i and j. For example, δ1 2 = 0, whereas δ3 3 = 1."
    Note: this did not copy and paste properly. " {\displaystyle \delta _{ij}={\begin{cases}0&{\text{if }}i\neq j,\\1&{\text{if }}i=j.\end{cases}}}" See the referenced link.

    1. https://en.wikipedia.org/wiki/Kronecker_delta
  5. Jul 19, 2016 #4
    but i m sure differential of path function is also δ
  6. Jul 19, 2016 #5
    It has several meanings, like any other symbol used in maths.
  7. Jul 19, 2016 #6
    hmmm...thats it....its quite confusing.....
  8. Jul 19, 2016 #7
    Many thanks I thought so that it was Kronecker delta
  9. Jul 19, 2016 #8


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