А SAGE оказывается не тихонько умер, а там интересные вещи делают:
http://sagemanifolds.obspm.fr/
Расширение позволяющее работать в SAGE с дифференциальной геометрией и тензорным счислением. По функциональности:
At present (version 1.1), SageManifolds functionalities include:
- topological manifolds: charts, open subsets, maps between manifolds, scalar fields
- differentiable manifolds: tangent spaces, vector frames, tensor fields, curves, pullback and pushforward operators
- standard tensor calculus (tensor product, contraction, symmetrization, etc.), even on non-parallelizable manifolds
- taking into account any monoterm tensor symmetry
- exterior calculus (wedge product, exterior derivative, Hodge duality)
- Lie derivatives of tensor fields
- affine connections (curvature, torsion)
- pseudo-Riemannian metrics
- some plotting capabilities (charts, points, curves, vector fields)
http://sagemanifolds.obspm.fr/
Расширение позволяющее работать в SAGE с дифференциальной геометрией и тензорным счислением. По функциональности:
At present (version 1.1), SageManifolds functionalities include:
- topological manifolds: charts, open subsets, maps between manifolds, scalar fields
- differentiable manifolds: tangent spaces, vector frames, tensor fields, curves, pullback and pushforward operators
- standard tensor calculus (tensor product, contraction, symmetrization, etc.), even on non-parallelizable manifolds
- taking into account any monoterm tensor symmetry
- exterior calculus (wedge product, exterior derivative, Hodge duality)
- Lie derivatives of tensor fields
- affine connections (curvature, torsion)
- pseudo-Riemannian metrics
- some plotting capabilities (charts, points, curves, vector fields)
А SAGE оказывается не тихонько умер, а там интересные вещи делают:
http://sagemanifolds.obspm.fr/
Расширение позволяющее работать в SAGE с дифференциальной геометрией и тензорным счислением. По функциональности:
At present (version 1.1), SageManifolds functionalities include:
- topological manifolds: charts, open subsets, maps between manifolds, scalar fields
- differentiable manifolds: tangent spaces, vector frames, tensor fields, curves, pullback and pushforward operators
- standard tensor calculus (tensor product, contraction, symmetrization, etc.), even on non-parallelizable manifolds
- taking into account any monoterm tensor symmetry
- exterior calculus (wedge product, exterior derivative, Hodge duality)
- Lie derivatives of tensor fields
- affine connections (curvature, torsion)
- pseudo-Riemannian metrics
- some plotting capabilities (charts, points, curves, vector fields)
http://sagemanifolds.obspm.fr/
Расширение позволяющее работать в SAGE с дифференциальной геометрией и тензорным счислением. По функциональности:
At present (version 1.1), SageManifolds functionalities include:
- topological manifolds: charts, open subsets, maps between manifolds, scalar fields
- differentiable manifolds: tangent spaces, vector frames, tensor fields, curves, pullback and pushforward operators
- standard tensor calculus (tensor product, contraction, symmetrization, etc.), even on non-parallelizable manifolds
- taking into account any monoterm tensor symmetry
- exterior calculus (wedge product, exterior derivative, Hodge duality)
- Lie derivatives of tensor fields
- affine connections (curvature, torsion)
- pseudo-Riemannian metrics
- some plotting capabilities (charts, points, curves, vector fields)
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Эту запись оставил(а) на своей стене Alexander Vershilov
