Update _base.py

adtzlr · Sep 2, 2024 · aeb8f77 · aeb8f77
1 parent d188fd2
commit aeb8f77
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/felupe/field/_base.py b/src/felupe/field/_base.py
@@ -184,8 +184,10 @@ def hess(self, dtype=None, out=None):
 
         ..  math::
 
-            \left( \frac{\partial u_i}{\partial X_J} \right)_{(qc)} =
-                \hat{u}_{ai} \left( \frac{\partial h_a}{\partial X_J} \right)_{(qc)}
+            \left( \frac{\partial^2 u_i}{\partial X_J~\partial X_K} \right)_{(qc)} =
+                \hat{u}_{ai} \left(
+                    \frac{\partial^2 h_a}{\partial X_J~\partial X_K}
+                \right)_{(qc)}
 
         Parameters
         ----------