Opened 5 years ago

Last modified 2 years ago

#25500 needs_work enhancement

Energy momentum tensor, Einstein tensor and Einstein space-time

Reported by: Hans Fotsing Tetsing Owned by:
Priority: major Milestone: sage-8.3
Component: geometry Keywords: Energy momentum tensor, Einstein tensor, Einstein space-time
Cc: Eric Gourgoulhon Merged in:
Authors: Hans FOTSING TETSING Reviewers: Eric Gourgoulhon
Report Upstream: N/A Work issues:
Branch: public/manifolds/EinsteinSpaceTime (Commits, GitHub, GitLab) Commit: 05646a6c4be21da90612be17f207cf4cce4e6ede
Dependencies: Stopgaps:

Status badges

Description (last modified by Hans Fotsing Tetsing)

This ticket provides to Sage the possibility to check if a space-time is a solution of Einstein's equations and even with some assumptions given as a list. Sage would be able to compute the Einstein's tensor and the user can set the gravitational constante and more. The user can also check if a 2-times covariant tensor is an energy momentum tensor. It is possible to ask conditions to obtain a space-time or an energy momentum, the output might be a system of equations.

Change History (6)

comment:1 Changed 5 years ago by Hans Fotsing Tetsing

Status: newneeds_review

comment:2 Changed 5 years ago by git

Commit: 3b3158343d314aadefbd5003b6bda3cd1f3bf42061e637cd41c86d49c8836489fb85be1006c9471b

Branch pushed to git repo; I updated commit sha1. New commits:

61e637cCorrection of some doctests: Einstein space-time

comment:3 Changed 5 years ago by git

Commit: 61e637cd41c86d49c8836489fb85be1006c9471b05646a6c4be21da90612be17f207cf4cce4e6ede

Branch pushed to git repo; I updated commit sha1. New commits:

25cff3cEnter the component of a metric while declaring the metric on a Parallelizable Manifold
a406fe6Solving some doctests errors
42eb129Adding the branch public/manifolds/MetricComponents into public/manifolds/EinsteinSpaceTime
05646a6Adding the branch public/manifolds/MetricComponents into public/manifolds/EinsteinSpaceTime

comment:4 Changed 5 years ago by Hans Fotsing Tetsing

Pleace, this ticket need review now, it has passed all doctests.

Thanks,


New commits:

61e637cCorrection of some doctests: Einstein space-time
25cff3cEnter the component of a metric while declaring the metric on a Parallelizable Manifold
a406fe6Solving some doctests errors
42eb129Adding the branch public/manifolds/MetricComponents into public/manifolds/EinsteinSpaceTime
05646a6Adding the branch public/manifolds/MetricComponents into public/manifolds/EinsteinSpaceTime

comment:5 Changed 4 years ago by Hans Fotsing Tetsing

Description: modified (diff)

comment:6 Changed 2 years ago by Frédéric Chapoton

Dependencies: 1
Status: needs_reviewneeds_work

no longer applies, the branch is red

Note: See TracTickets for help on using tickets.