From 337cf38fa46c5b20fa15c70813702ff3664df05c Mon Sep 17 00:00:00 2001
From: bastonero <bastonero.lorenzo@gmail.com>
Date: Thu, 31 Aug 2023 10:31:41 +0000
Subject: [PATCH] Docs: fix second order derivative formula

---
 docs/source/3_iraman.ipynb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/source/3_iraman.ipynb b/docs/source/3_iraman.ipynb
index 6a07ef8..7dc69e7 100644
--- a/docs/source/3_iraman.ipynb
+++ b/docs/source/3_iraman.ipynb
@@ -39,11 +39,11 @@
     "The same theory we saw in previous tutorials applies here. Note that for computing _second order_ derivatives of forces we need a slightly different formula:\n",
     "\n",
     "\\begin{equation}\n",
-    "    \\left . \\frac{\\partial f(x)}{\\partial x} \\right|_{x=0}\n",
+    "    \\left . \\frac{\\partial^2 f(x)}{\\partial x^2} \\right|_{x=0}\n",
     "    =\n",
     "    \\frac{1}{h^2}\n",
     "    \\left [\n",
-    "        f(h) -2f(0) +f(-2h)\n",
+    "        f(h) -2f(0) +f(-h)\n",
     "    \\right ]\n",
     "    + \\mathcal{O}(h^2)\n",
     "\\end{equation}\n",