From 9abf096e836103e3e28d961cf2c1022d916927af Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sun, 14 Apr 2024 16:55:58 +0200
Subject: Expand knowledge base

---
 source/know/concept/step-index-fiber/index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'source/know/concept/step-index-fiber')

diff --git a/source/know/concept/step-index-fiber/index.md b/source/know/concept/step-index-fiber/index.md
index 2d049a1..e80480b 100644
--- a/source/know/concept/step-index-fiber/index.md
+++ b/source/know/concept/step-index-fiber/index.md
@@ -147,7 +147,7 @@ and check if we can then arrive at a non-trivial $$\Phi$$ for each case.
         &&= B
     \end{alignedat}$$
 
-    $$B$$ can be nonzero, so this a valid solution.
+    $$B$$ can be nonzero, so this is a valid solution.
     We conclude that $$\ell^2 = 0$$ is the ground state.
 
 * For $$\ell^2 > 0$$, all solutions have the form
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