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Thread: what is the name of this relativity formula?

  1. #1 what is the name of this relativity formula? 
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    I`ve been studying the mathematics of relativity theory and came across this one:




    All I really want to know is what the name of this formula is. Does it have a name?


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  3. #2  
    Moderator Moderator Markus Hanke's Avatar
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    Would you have a reference for where you saw this expression ?
    The letter is usually used for proper time in the context of relativity, however, I have never before seen bra-ket notation being used in a proper time path integral. I can't really make much sense of it unless I see in which context it is used.


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  4. #3  
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    I got this formula from here:

    What are the formula of relativity theory - Science Forums

    Essentially, I asked a question similar to this one on another science forum, but when it came to asking about the actual name of this formula, I got no replies.
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  5. #4  
    Moderator Moderator Markus Hanke's Avatar
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    Ok, thanks for the link, it is clear now. Just as I suspected this is the formula for proper time, just written in a somewhat unusual manner. In standard textbooks it usually appears as



    See also here for further information :

    Proper time - Wikipedia, the free encyclopedia
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