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1 files changed, 1 insertions, 1 deletions

diff --git a/content/know/concept/cauchy-stress-tensor/index.pdc b/content/know/concept/cauchy-stress-tensor/index.pdc
index 6c7c97a..a26e2a8 100644
--- a/content/know/concept/cauchy-stress-tensor/index.pdc
+++ b/content/know/concept/cauchy-stress-tensor/index.pdc
@@ -171,7 +171,7 @@ $$\begin{aligned}
 \end{aligned}$$
 
 For some people, this equation may be more enlightening in index notation,
-where $\vec{\sigma}_i$ is the $i$th row of the tensor (implicitly transposed):
+where $\nabla_j = \pdv*{x_j}$ is the partial derivative with respect to the $j$th coordinate:
 
 $$\begin{aligned}
     F_{s, i}