Statements (14)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
mathematical equations
|
| gptkbp:describes |
evolution of null geodesic congruences
|
| gptkbp:field |
gptkb:general_relativity
|
| https://www.w3.org/2000/01/rdf-schema#label |
Sachs equations
|
| gptkbp:namedAfter |
gptkb:Rainer_K._Sachs
|
| gptkbp:publishedIn |
1961
|
| gptkbp:relatedTo |
expansion
shear twist optical scalars |
| gptkbp:usedIn |
gptkb:cosmology
gravitational lensing |
| gptkbp:bfsParent |
gptkb:Robert_L._Sachs
|
| gptkbp:bfsLayer |
7
|