Fix oseen

Signed-off-by: Umberto Zerbinati <[email protected]>

docs/src/PETScPC/oseen.py.rst

@@ -2,6 +2,7 @@ Vertex Patch smoothing for Augmented Lagrangian formulations of the Oseen proble
 ===================================================================================
 
 In this tutorial, we will see how to use an augmented Lagrangian formulation to precondition the Oseen problem, i.e.
+
 .. math::
    
    \text{Given }\vec{\beta}\in \mathbb{R}^3 \text{ find } (\vec{u},p) \in [H^1_{0}(\Omega)]^d\times L^2(\Omega) \text{ s.t. }
@@ -10,6 +11,7 @@ In this tutorial, we will see how to use an augmented Lagrangian formulation to
       \nu (\nabla \vec{u},\nabla \vec{v})_{L^2(\Omega)} + (\nabla\cdot \vec{v}, p)_{L^2(\Omega)} -(\nabla \vec{u}\vec{\beta},\vec{v})_{L^2(\Omega)} + (div(\vec{u}),div(\vec{v}))_{L^2(\Omega)}  = (\vec{f},\vec{v})_{L^2(\Omega)} \qquad \forall v\in H^1_{0}(\Omega)\\
       (\nabla\cdot \vec{u},q)_{L^2(\Omega)} = 0 \qquad \froall q\in L^2(\Omega)
    \end{cases}
+
 Let us begin defining the parameters of the problem. ::
 
    from ngsolve import *