SpaceSpinors: 3D space spinors in 4D spacetime.

Authors: Thomas Bäckdahl © 2025-2026 under GPL.

Introduction

SpaceSpinors is a package designed to handle 3 dimensional space spinors on spacelike hypersurfaces in a 4 dimensional spacetime.

See SpaceSpinors.History

Download and installation

Current version: 0.1.3 (as of 23 June 2025). It is recommended to download the main xAct bundle, but you can also download the different files separately:

SpaceSpinors.nb: source file.
SpaceSpinors.m: package file. This file is automatically generated by Mathematica when SpaceSpinors.nb is saved. This is the only essential file.
SpaceSpinorsDoc.nb: documentation file.
General Public License.

or from github.

See the file Installation notes.