lets say we have a covariant 4-gradient ∂[itex]_{μ}[/itex] = (1/c ∂/∂t, ∇). How do I actually apply this to a function, say x^2 where x is an arbitrary 4-vector (ct,-x,-y,-z)?(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Using the 4-gradient

**Physics Forums | Science Articles, Homework Help, Discussion**