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What is this letter?

  1. Feb 2, 2012 #1
    Hi,

    attachment.php?attachmentid=43402&stc=1&d=1328189744.png
    Could anyone tell me what letter the circled one is? I thought it might be “tau” τ or “gamma” γ, but none of the two looked exactly the same as it.

    Bob
     

    Attached Files:

  2. jcsd
  3. Feb 2, 2012 #2
    I'm not sure, though it might help to know what the symbol is meant to represent... does it correspond to [itex]\left|\vec{r}-\vec{r'}\right|[/itex]?
     
  4. Feb 2, 2012 #3
    Looks like eta
     
  5. Feb 2, 2012 #4
    Nytik,

    Yes, exactly:
    This symbol represent radius from a point electric source, and is found on page 235 of Griffiths, David J. - Introduction to Electrodynamics (3ed).

    Dadface,
    Looks alike, but I am not sure.

    Bob
     
  6. Feb 2, 2012 #5

    Borek

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    Staff: Mentor

  7. Feb 2, 2012 #6
    Borek,

    It looks very close. I would agree with it.

    Bob
     
  8. Feb 2, 2012 #7
    That r looks like a perfect match! Now I'm wondering how Borek knew that typeface so well...
     
  9. Feb 2, 2012 #8

    Borek

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    Staff: Mentor

    I didn't knew typeface, I knew the letter. That was just the best link with this kind of r I could find in a few minutes.
     
  10. Feb 2, 2012 #9
  11. Feb 2, 2012 #10
    http://en.wikipedia.org/wiki/Copperplate_script

    That's the original style from which most "curly" scripts originated from.
     
  12. Feb 2, 2012 #11

    Borek

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    Staff: Mentor

    I bet this kind of r is earlier than that and came from the cursive.
     
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