A general introduction to space groups

Souvignier, B.

doi:10.1107/97809553602060000921

International
Tables for
Crystallography
Volume A
Space-group symmetry
Edited by M. I. Aroyo

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International Tables for Crystallography (2016). Vol. A. ch. 1.3, pp. 22-41
https://doi.org/10.1107/97809553602060000921

Chapter 1.3. A general introduction to space groups

B. Souvignier^a ^*

^a Radboud University Nijmegen, Faculty of Science, Mathematics and Computing Science, Institute for Mathematics, Astrophysics and Particle Physics, Postbus 9010, 6500 GL Nijmegen, The Netherlands
Correspondence e-mail: souvi@math.ru.nl

Footnotes

¹ The trace of a matrix is the sum of its diagonal entries.
² A symmetric matrix $[{\bi G}]$ is positive definite if $[{\bf v}^{\rm T} \cdot {\bi G} \cdot {\bf v}\,\gt\, 0]$ for every vector $[{\bf v} \neq 0]$ .

International Tables for Crystallography (2016). Vol. A. ch. 1.3, pp. 22-41
https://doi.org/10.1107/97809553602060000921