View Single Post
Matterwave
#2
Mar3-12, 07:42 PM
Sci Advisor
Matterwave's Avatar
P: 2,728
Your second expression is almost right, except you have some trouble with indices. If alpha and beta are free indices on the left, you should not use them as summation indices on the right. Use gamma as your summation index, and then alpha and beta should remain free indices.