jennyjones Messages 34 Reaction score 0 Thread starter Feb 23, 2015 #1 can some tell me why the second line follows from the first in the attachment thank you Attachments Schermafbeelding 2015-02-23 om 16.29.21.png 5.3 KB · Views: 546
Orodruin Staff Emeritus Science Advisor Homework Helper Insights Author Gold Member 2025 Award Messages 22,832 Reaction score 14,876 Feb 23, 2015 #2 It doesn't. The two sides of the equation have different free indices.
jennyjones Messages 34 Reaction score 0 Feb 23, 2015 #3 Orodruin said: It doesn't. The two sides of the equation have different free indices. thanx!
Matterwave Science Advisor Homework Helper Gold Member Messages 4,116 Reaction score 437 Feb 23, 2015 #4 For some reason they have mad a swap ##\mu\leftrightarrow\nu## in the second line...and also switch the order of the partial derivatives.
For some reason they have mad a swap ##\mu\leftrightarrow\nu## in the second line...and also switch the order of the partial derivatives.