11. The work on relativistic fields with arbitrary spins was later important in supergravity . 12. Such a theory is called a supergravity theory. 13. Superstring theories, and eleven-dimensional supergravity . 14. As usual, there is a supergravity supermultiplet. 15. She is the author of many papers on black hole solutions in supergravity theories. 16. At low energies, the superstring theories are approximated by supergravity in ten spacetime dimensions. 17. Similarly, M-theory is approximated at low energies by supergravity in eleven dimensions. 18. Supergravity is more restrictive because it places an upper limit on the number of dimensions.19. The supergravity theories that have attracted the most interest contain no spins higher than two. 20. In 11d supergravity or M-theory, we have a 3-form electrodynamics.
