>Solves all of physics in one formula.Okay done, wheres my Noble prize?
>>16545819you have to specify it, anon
>>16545824Never!
>>16545858lolfat shroom lookin faguette
>>16546737>[math]F^2[/math] instead of [math]F_{ab}F^{ab}[/math]Was the person who created this image retarded?
>>16546743The square makes a lot of sense since the minkowski metric is just a generalization of the usual euclidean one where that is exactly the square. Do if you are going to put also spinors and shit yeah fucking physicists should be more specific about their notation.
>>16546743>>16546873Literally arguing about semantics.
>>16546879It is about notation and you could say maybe syntax but not semantics. In math this word have particular meanings and are important. So kys
>>16546886>It is about notation and you could say maybe syntax but not semantics. In math this word have particular meanings and are important. So kysLiterally arguing about semantics
>>16545819The action of OP in this thread is also zero.>>16546743If F is not a symmetric tensor then the order of indices will make a difference when you do the contraction.
>>16546737Where's Bohr :(
>>16547931Sure, but it’s just conventionally understood that F^2 is F_munu F^munu and not F_munu F^numu. 90% of the “difficultly” of learning QFT is learning all the bullshit notation that people came up with after years and years of churning out calculations. And when you do those, you don’t want to waste paper on long expressions that appear all the time.P.S. F^2 = F_munu F^numu would have been a much better choice because it agrees with how traces are taken in general and makes it clear that the kinetic energy part of the EM action is indeed positive. But here we are.
