Understanding Complex Eigenvalues in General Relativity

[shounakbhatta]

Hello,

In GR where does complex eigen values shows up its' place. I mean to say what is the practical usage of complex eigenvalues in General relativity.

Also if anybody can explain where in GR, complex vector spaces come into picture.

-- Shounak

 

[robphy]

http://en.wikipedia.org/wiki/Spinor

 

[bcrowell]

http://www.lightandmatter.com/genrel/ , section 6.2.5, the geodetic effect