Introduction to the xAct suite

17 Mar 2025, 08:50 → 19 Mar 2025, 18:30 Asia/Seoul

B438 (CTPU-CGA, Institute for Basic Science)

Nils A. Nilsson (CTPU-CGA, Institute for Basic Science)

The xAct suite is a collection of Mathematica packages for efficient tensor algebra. With capabilities such as abstract tensor manipulation, components and charts, variational calculus, perturbation theory, and more, xAct is a powerful toolbox.

This workshop will cover the basic capabilities of the xAct suite. It will be highly interactive and will include several hands-on problem-solving sessions, as well as an external lecture. Topics include:

 

• Basics of the Mathematica language
• xAct: Working with manifolds, vectors, and tensors
• xAct: Adding torsion
• xAct: Variational calculus in two ways
• xAct: Working with components
• xAct: Perturbation theory
• Advanced topics and applications
• Common mistakes and problems

 

All lecture slides and Mathematica notebooks will be made public after the workshop.

Invited Speaker: Guillaume Faye, Institute d'Astrophysique (IAP), Paris, France

Organiser: Nils A. Nilsson (IBS CTPU-CGA)

Monday, 17 March

08:50 → 09:00 Opening remarks

Speaker: Nils A. Nilsson (CTPU-CGA, Institute for Basic Science)

09:00 → 10:30 Lecture 1

10:30 → 11:00 Break

11:00 → 12:30 Programming session 1

12:30 → 14:00 Lunch + free discussion

14:00 → 15:30 Lecture 2

15:30 → 16:00 Break

16:00 → 17:30 Programming session 2

Tuesday, 18 March

09:00 → 10:30 Lecture 3

10:30 → 11:00 Break

11:00 → 12:30 Programming session 3

12:30 → 14:00 Lunch + free discussion

14:00 → 15:30 Lecture 4

15:30 → 16:00 Break

16:00 → 17:30 Programming session 4

Wednesday, 19 March

09:00 → 10:30 Lecture 5

10:30 → 11:00 Break

11:00 → 12:30 Programming session 5

12:30 → 14:00 Lunch + free discussion

14:00 → 17:00 Advanced topics