- #1
nomather1471
- 19
- 1
Hi there, i have a lot of question about Lorentz-Minkowski geometry:
1) Is Lorentz metric degenere or non-degenere? Why?
2) In spacelike subspaces only spacelike vectors live in it there is not problem here but how can
we say that timelike subspaces include null and spacelike vectors and lightlike subspaces include
spacelike vector?
3) Let E1 spacelike and E2 timelike vector then E1+E2 is null vector, proof...?
4) If Sp{E1,E2} spacelike, Sp{E1,E3} and Sp{E2,E3}
are timelike planes Sp{E1,E2+E3} is lightlike plane?
5) E1+E2+E3 is spacelike vector but
Sp{E1,E1+E2+E3} is lightlike plane?
6) E2+E3 is lightlike vector but Sp{E2+E3,E3} is timelike plane?
1) Is Lorentz metric degenere or non-degenere? Why?
2) In spacelike subspaces only spacelike vectors live in it there is not problem here but how can
we say that timelike subspaces include null and spacelike vectors and lightlike subspaces include
spacelike vector?
3) Let E1 spacelike and E2 timelike vector then E1+E2 is null vector, proof...?
4) If Sp{E1,E2} spacelike, Sp{E1,E3} and Sp{E2,E3}
are timelike planes Sp{E1,E2+E3} is lightlike plane?
5) E1+E2+E3 is spacelike vector but
Sp{E1,E1+E2+E3} is lightlike plane?
6) E2+E3 is lightlike vector but Sp{E2+E3,E3} is timelike plane?