From 39b744b231457e1f1e4f41737c1675f04fedffde Mon Sep 17 00:00:00 2001
From: Beanpow <beanpow@gmail.com>
Date: Fri, 2 Jun 2023 16:53:32 +0800
Subject: [PATCH] Fix the effective time constant function of muscle

---
 doc/modeling.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/modeling.rst b/doc/modeling.rst
index 832d80aa..6dd0f1c2 100644
--- a/doc/modeling.rst
+++ b/doc/modeling.rst
@@ -772,7 +772,7 @@ are two time constants specified with the attribute timeconst, namely :math:`\te
 <https://doi.org/10.1115/1.4023390>`__, the effective time constant :math:`\tau` is then computed at runtime as:
 
 .. math::
-   \tau(\texttt{ctrl}-\texttt{act}) =
+   \tau(\texttt{ctrl}, \texttt{act}) =
    \begin{cases}
       \tau_\text{act} \cdot (0.5 + 1.5\cdot\texttt{act}) & \texttt{ctrl}-\texttt{act} \gt 0 \\
       \tau_\text{deact} / (0.5 + 1.5\cdot\texttt{act}) & \texttt{ctrl} - \texttt{act} \leq 0