From 28cd01ac09a95ac40fcc6b57c3f7e8ae38010cac Mon Sep 17 00:00:00 2001
From: Killua Zoldyck <junyixu0@gmail.com>
Date: Mon, 25 Mar 2024 20:43:53 +0800
Subject: [PATCH] fix: Replace `\to` with `\mapsto` due to the nonstandard
 meaning of `\to`

Co-authored-by: Michael Abbott <32575566+mcabbott@users.noreply.github.com>
---
 docs/src/dev/how_it_works.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/src/dev/how_it_works.md b/docs/src/dev/how_it_works.md
index 753602e8..9fe4820b 100644
--- a/docs/src/dev/how_it_works.md
+++ b/docs/src/dev/how_it_works.md
@@ -105,13 +105,13 @@ two calls to ``f`` to evaluate the gradient:
 ```
 1st call:
 ```math
-\to \vec{x}_{\epsilon} = \begin{bmatrix}
+\vec{x}_{\epsilon} = \begin{bmatrix}
                         x_1 + \epsilon_1 \\
                         x_2 + \epsilon_2 \\
                         x_3 \\
                         x_4
                      \end{bmatrix}
-\to
+\mapsto
 f(\vec{x}_{\epsilon}) = f(\vec{x}) + \frac{\delta f(\vec{x})}{\delta x_1} \epsilon_1 + \frac{\delta f(\vec{x})}{\delta x_2} \epsilon_2,
 ```
 2nd call: