From fb07d740f4ab9016736da6aecd88c84a6f2e5633 Mon Sep 17 00:00:00 2001
From: Jaime Arriaga Garcia <j.a.arriagagarcia@tudelft.nl>
Date: Mon, 14 Oct 2024 09:24:34 +0200
Subject: [PATCH] Update file 8-boundary-value-problem.ipynb

---
 book/numerical_methods/8-boundary-value-problem.ipynb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/book/numerical_methods/8-boundary-value-problem.ipynb b/book/numerical_methods/8-boundary-value-problem.ipynb
index e1b66351..caab199a 100644
--- a/book/numerical_methods/8-boundary-value-problem.ipynb
+++ b/book/numerical_methods/8-boundary-value-problem.ipynb
@@ -411,7 +411,7 @@
     "\n",
     "\n",
     "$$\n",
-    "\\text{Backward Difference: } f'= \\frac{f(x_i)-f(x_{-1})}{\\Delta x} + \\mathcal{O}(\\Delta x)\n",
+    "\\text{Backward Difference: } f'= \\frac{f(x_i)-f(x_{i-1})}{\\Delta x} + \\mathcal{O}(\\Delta x)\n",
     "$$\n",
     "\n",
     "$$\n",
-- 
GitLab