FCReplaceAll not replacing four vector values

[Pholipo]

Greetings,

Why isn't the ReplaceAll working with the four-vector below? I actually want to make more replacements in the output variable ex5. I basically need to implement a shift in the k 4-vector in the whole expression resulting from these common shifts made in Feynman Parametrization. The D there is the dimension made variable in Dimensional Regularization.

[vsht]

Hi, it's because you're ignoring the difference between internal and external representations https://feyncalc.github.io/FeynCalcBookDev/InternalExternal.html I suggest that you go through the tutorial in the manual first before trying to calculate something. Those are very basic things and without having a good understanding how they work you won't get far. Am 25.06.24 um 01:48 schrieb Pholipo:

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Greetings, Why isn't the ReplaceAll working with the four-vector below? I actually want to make more replacements in the output variable ex5. I basically need to implement a shift in the k 4-vector in the whole expression resulting from these common shifts made in Feynman Parametrization. The D there is the dimension made variable in Dimensional Regularization. image.png (view on web) <https://github.com/FeynCalc/feyncalc/assets/97998280/354b5c8f-e35b-4f43-8f3f-3b23192607c8> — Reply to this email directly, view it on GitHub <#276>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABXSD5HIPDGNTPOYAHKKH7DZJCV55AVCNFSM6AAAAABJ2XPJMGVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZWHA2TSOBVHE>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[Pholipo]

Thanks a lot!