Fixed typo.

diff --git a/share/html/online/mdp_opt.html b/share/html/online/mdp_opt.html
index a510d3e84bf6c3d04bd4f63c96d50cd0567c2916..1f6f16de4a2f59289d217bcb32d94e37d66f383d 100644 (file)
--- a/share/html/online/mdp_opt.html
+++ b/share/html/online/mdp_opt.html
@@ -874,7 +874,7 @@ steps of the gromacs implementation for the current time step pressure.</dd>
 </dl></dd>
 <dt><b>MTTK</b></dt>
 <dd>Martyna-Tuckerman-Tobias-Klein implementation, only useable with <b>md-vv</b>
-or <b>md-vv-avek</b>, very similar to Parinello-Raphman.  
+or <b>md-vv-avek</b>, very similar to Parrinello-Rahman.  
 As for Nose-Hoover temperature coupling the time constant <b>tau_p</b>
 [ps] is the period of pressure fluctuations at equilibrium. This is
 probably a better method when you want to apply pressure scaling