From 1b23832856b95d43c2864add4af3a57af35916ef Mon Sep 17 00:00:00 2001 From: Claude Meny Date: Thu, 13 Aug 2020 13:15:45 +0200 Subject: [PATCH] Update textbook.fr.md --- .../05.classical-mechanics/vector-analysis/textbook.fr.md | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md index 7d1f33060..c54a9a8f7 100644 --- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md +++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md @@ -260,12 +260,14 @@ $`M=M(\alpha, \beta, \gamma)`$. [EN] There are *several possible ways to define spatial coordinates*: We speak of ** coordinate systems**. -* [ES] +* [ES] si hay una ambigüedad con t, por ejemplo si t se usa para la densidad. [FR] [EN] Specific alphanumeric characters are defined for some widely used coordinate systems :
\- cartesian : $`(x, y, z)`$ or $`(O, x_1, x_2, x_3)`$
-\- cylindric : $`(\rho, \phi, z)`$ or $`(r, \phi, z)`$
-\- spheric : $`(x, y, z)`$ or $`(O, x_1, x_2, x_3)`$
+\- cylindrical https://en.wikipedia.org/wiki/ISO_31-11 :
+$`(\rho, \phi, z)`$ (or $`(r, \phi, z)`$ if there is an ambiguity with $`\rho`$, +for example if $`\rho`$ is used for density (electric) charge density).
+\- spherical : $`(\rho, \phi, z)`$
#### Características de una base / Caractéristiques d’une base et d’un repère / Characteristics of a base