fix quaternion laTeX

Author: kbuzzard

blueprint/src/chapter/chtopbestiary.tex

@@ -196,7 +196,7 @@ \section{Automorphic forms and representations}
 \begin{proof} See Flath's article in~\cite{corvallis1}.
 \end{proof}
 
-As mentioned above, we only need all of this for abelian algebraic groups and for inner forms of $\GL_2$ over totally real fields, where everything can be made more concrete (and in particular where I can write down concrete definitions, although this still needs to be done). In particular, we don't strictly speaking need all of the above, we could just cheat and deal with $\GL_2(\R)$ and $\H^\times$ separately.
+As mentioned above, we only need all of this for abelian algebraic groups and for inner forms of $\GL_2$ over totally real fields, where everything can be made more concrete (and in particular where I can write down concrete definitions, although this still needs to be done). In particular, we don't strictly speaking need all of the above, we could just cheat and deal with $\GL_2(\R)$ and $\calH^\times$ separately.
 
 The theorems I need are: Jacquet-Langlands for inner forms of $\GL_2$ over totally real fields, 
 and multiplicity 1 for these inner forms. We also need cyclic base change plus classification of image, all for totally definite quaternion algebras, and we need