Talk:Recurrent tensor

examples
When there is time I will complete the set of examples

1. parallel tensors

2. parallel vector fields

3. recurrent vector fields on semiriemannian manifolds

4. metric space $$\leftrightarrow$$ recurrent conformal metric $$\leftrightarrow$$ weyl structure

5. recurrent curvature tensor $$\leftrightarrow$$ recurrent space-time

6. recurrent vectorfields are some generalisazion of pp-waves and appear in different context in general relativity

meaning of recurrent

 * Does anybody know, why these tensors are originally called recurrent? (have not read the full article by Walker yet)
 * In what sense is it recurring?

--Oberflaechenelement (talk) 15:39, 22 January 2010 (UTC)