- #1
ehrenfest
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Homework Statement
Is it true that the sum of any two spacelike vectors is spacelike? I spent forever on this problem (5.4 from the link) and I think not...
http://books.google.com/books?id=xm...ts=aowTGAbHj6&sig=EIQ6_W2eCQmMnHVP0l6FH2dEehg
Actually, I think it is clearly not true if you think about the light-cone. But go to the link and tell me if there is something I am missing.
Homework Equations
The Attempt at a Solution
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