RicciTensor¶

Ricci tensor and Ricci scalar.

class gravica.ricci.RicciTensor(riemann)¶

Bases: object

Ricci tensor \(R_{ab} = R^c_{\ acb}\).

classmethod from_metric(metric)¶

Build from a MetricTensor.

property components: list[list[Expression]]¶: \(R_{ab}\) indexed as [a][b].

gravica.ricci.ricci_scalar(ricci)¶

Ricci scalar \(R = g^{ab}\,R_{ab}\).