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-rw-r--r--content/know/concept/guiding-center-theory/index.pdc2
1 files changed, 1 insertions, 1 deletions
diff --git a/content/know/concept/guiding-center-theory/index.pdc b/content/know/concept/guiding-center-theory/index.pdc
index 12abac0..dee10ba 100644
--- a/content/know/concept/guiding-center-theory/index.pdc
+++ b/content/know/concept/guiding-center-theory/index.pdc
@@ -174,7 +174,7 @@ $$\begin{aligned}
m \dv{\vb{u}_{gc}}{t}
= q \big( \vb{E} + \vb{u}_{gc} \cross \vb{B}
+ \vb{u}_{gc} \cross (\vb{x}_L \cdot \nabla) \vb{B}
- + + \vb{u}_L \cross (\vb{x}_L \cdot \nabla) \vb{B} \big)
+ + \vb{u}_L \cross (\vb{x}_L \cdot \nabla) \vb{B} \big)
\end{aligned}$$
We approximate this by taking the average over a single gyration,