doc/source/overview.rst: delete errant ampersant.

diff --git a/doc/source/overview.rst b/doc/source/overview.rst
index 37e467a413172a447f6f69ab89e2239f33f58769..95eb384f6069233747fa795fd18c4b0431c087d1 100644 (file)
--- a/doc/source/overview.rst
+++ b/doc/source/overview.rst
@@ -27,7 +27,7 @@ an :math:`\bar{x}` from
 and player two chooses a :math:`\bar{y}` from
 
 .. math::
-  \Delta_{2} &=
+  \Delta_{2} =
     \left\lbrace
       y \in K\ \middle|\ \left\langle y,e_{1} \right\rangle = 1
     \right\rbrace.