A Dirac Propagator: Learn to Reach 8.2

[Ayoub Tamin]

TL;DR Summary

I looked for details in every book but they'all say we can easily write

wanna know how to get to 8.2

 

[nrqed]

Summary:: I looked for details in every book but they'all say we can easily write

wanna know how to get to 8.2

Did you try applying the derivative to the integrand? It directly gives the answer.

 

[Ayoub Tamin]

Did you try applying the derivative to the integrand? It directly gives the answer.

I did apply the derivative of time only, can u put more details please?

 

[Vanadium 50]

Is it too much to ask that you write more? (and to use real words, unlike "please" and "wanna") We're trying to help you, but you seem resistant to telling us what you're doing and where you are stuck.

 

[Ayoub Tamin]

Is it too much to ask that you write more? (and to use real words, unlike "please" and "wanna") We're trying to help you, but you seem resistant to telling us what you're doing and where you are stuck.

sorry, I just read the rules here, I'm kinda new it won't happen again.

 

[Vanadium 50]

But you're still not telling us what you are doing and where you are stuck!

 

[Ayoub Tamin]

I tried to apply the derivative again and I got the answer now. thank you all and sorry for the messed up thread.

 

[SergioPL]

I miss this type of explanations in the physics books because even for people not especially strong at maths this derivation will be doable but, what if you first try to do other things to figure out the derivation, you may end losing a lot of time in the process of understanding it.