From e2f6ff4487606f4052b9c912b9faa2c8d8f1ca10 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sun, 18 Jun 2023 17:59:42 +0200
Subject: Improve knowledge base

---
 source/know/concept/orthogonal-curvilinear-coordinates/index.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'source/know/concept/orthogonal-curvilinear-coordinates')

diff --git a/source/know/concept/orthogonal-curvilinear-coordinates/index.md b/source/know/concept/orthogonal-curvilinear-coordinates/index.md
index 669358c..4714a95 100644
--- a/source/know/concept/orthogonal-curvilinear-coordinates/index.md
+++ b/source/know/concept/orthogonal-curvilinear-coordinates/index.md
@@ -18,10 +18,10 @@ where at least one of the coordinate surfaces is curved:
 e.g. in cylindrical coordinates, the coordinate line of $$r$$ and $$z$$ is a circle.
 Here we limit ourselves to **orthogonal** systems,
 where the coordinate surfaces are always perpendicular.
-Examples of such orthogonal curvilinear systems include
+Examples of such orthogonal curvilinear systems are
 [spherical coordinates](/know/concept/spherical-coordinates/),
-[cylindrical polar coordinates](/know/concept/cylindrical-polar-coordinates/),
-[cylindrical parabolic coordinates](/know/concept/cylindrical-parabolic-coordinates/),
+[polar cylindrical coordinates](/know/concept/polar-cylindrical-coordinates/),
+[parabolic cylindrical coordinates](/know/concept/parabolic-cylindrical-coordinates/),
 and (trivially) [Cartesian coordinates](/know/concept/cartesian-coordinates/).
 
 
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