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-- A figure would be welcome -- — Preceding unsigned comment added by Frederic Y Bois (talk • contribs) 20:52, 3 June 2020 (UTC)
Jidanni (talk) 09:18, 25 July 2023 (UTC)It is requested that a mathematical diagram or diagrams be included in this article to improve its quality. Specific illustrations, plots or diagrams can be requested at the Graphic Lab.
For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images.