A Cauchy surface is a 3d spacelike slice of spacetime.(adsbygoogle = window.adsbygoogle || []).push({});

Could you read the definition (17) p18

the author says that "one can proove that ##\sigma## does not depend on the choice of the Cauchy surface because the functions obey the law of motion."

Could you elaborate?

Thanks

Could any one add "h" in the title (choice)?

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

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

# Things that do not depend on the choice of Cauchy surface

Loading...

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