diff --git a/python/dynreduced.py b/python/dynreduced.py
new file mode 100644
index 0000000000000000000000000000000000000000..f2c1d03e823ecfd3328cd9db0a58c1b0911f02b2
--- /dev/null
+++ b/python/dynreduced.py
@@ -0,0 +1,232 @@
+from dynamic_graph import plug
+from dynamic_graph.sot.core import *
+from dynamic_graph.sot.core.math_small_entities import Derivator_of_Matrix
+from dynamic_graph.sot.dynamics import *
+from dynamic_graph.sot.dyninv import *
+import dynamic_graph.script_shortcuts
+from dynamic_graph.script_shortcuts import optionalparentheses
+from dynamic_graph.matlab import matlab
+from meta_task_dyn_6d import MetaTaskDyn6d
+from attime import attime
+
+from robotSpecific import pkgDataRootDir,modelName,robotDimension,initialConfig,gearRatio,inertiaRotor
+robotName = 'hrp10small'
+robotName = 'hrp14small'
+
+from numpy import *
+def totuple( a ):
+    al=a.tolist()
+    res=[]
+    for i in range(a.shape[0]):
+        res.append( tuple(al[i]) )
+    return tuple(res)
+
+# --- ROBOT SIMU ---------------------------------------------------------------
+# --- ROBOT SIMU ---------------------------------------------------------------
+# --- ROBOT SIMU ---------------------------------------------------------------
+
+robotDim=robotDimension[robotName]
+RobotClass = RobotDynSimu
+robot = RobotClass("robot")
+robot.resize(robotDim)
+
+robot.set( initialConfig[robotName] )
+dt=5e-3
+
+# --- VIEWER -------------------------------------------------------------------
+# --- VIEWER -------------------------------------------------------------------
+# --- VIEWER -------------------------------------------------------------------
+try:
+   import robotviewer
+
+   def stateFullSize(robot):
+       return [float(val) for val in robot.state.value]+10*[0.0]
+   RobotClass.stateFullSize = stateFullSize
+   robot.viewer = robotviewer.client('XML-RPC')
+   # Check the connection
+   robot.viewer.updateElementConfig('hrp',robot.stateFullSize())
+
+   def refreshView( robot ):
+       robot.viewer.updateElementConfig('hrp',robot.stateFullSize())
+   RobotClass.refresh = refreshView
+   def incrementView( robot,dt ):
+       robot.incrementNoView(dt)
+       robot.refresh()
+   RobotClass.incrementNoView = RobotClass.increment
+   RobotClass.increment = incrementView
+   def setView( robot,*args ):
+       robot.setNoView(*args)
+       robot.refresh()
+   RobotClass.setNoView = RobotClass.set
+   RobotClass.set = setView
+
+   robot.refresh()
+except:
+    print "No robot viewer, sorry."
+    robot.viewer = None
+
+# --- MAIN LOOP ------------------------------------------
+
+qs=[]
+def inc():
+    attime.run(robot.control.time+1)
+    robot.increment(dt)
+    qs.append(robot.state.value)
+
+from ThreadInterruptibleLoop import *
+@loopInThread
+def loop():
+    inc()
+runner=loop()
+
+@optionalparentheses
+def go(): runner.play()
+@optionalparentheses
+def stop(): runner.pause()
+@optionalparentheses
+def next(): #runner.once()
+    inc()
+    print sot.velocity.value
+
+# --- shortcuts -------------------------------------------------
+@optionalparentheses
+def q():
+    if 'dyn' in globals(): print dyn.ffposition.__repr__()
+    print robot.state.__repr__()
+@optionalparentheses
+def qdot(): print robot.control.__repr__()
+@optionalparentheses
+def t(): print robot.state.time-1
+@optionalparentheses
+def iter():         print 'iter = ',robot.state.time
+@optionalparentheses
+def status():       print runner.isPlay
+
+# --- DYN ----------------------------------------------------------------------
+modelDir = pkgDataRootDir[robotName]
+xmlDir = pkgDataRootDir[robotName]
+specificitiesPath = xmlDir + '/HRP2SpecificitiesSmall.xml'
+jointRankPath = xmlDir + '/HRP2LinkJointRankSmall.xml'
+
+dyn = Dynamic("dyn")
+dyn.setFiles(modelDir,modelName[robotName],specificitiesPath,jointRankPath)
+dyn.parse()
+
+dyn.inertiaRotor.value = inertiaRotor[robotName]
+dyn.gearRatio.value = gearRatio[robotName]
+
+plug(robot.state,dyn.position)
+plug(robot.velocity,dyn.velocity)
+dyn.acceleration.value = robotDim*(0.,)
+
+dyn.ffposition.unplug()
+dyn.ffvelocity.unplug()
+dyn.ffacceleration.unplug()
+
+dyn.setProperty('ComputeBackwardDynamics','true')
+dyn.setProperty('ComputeAccelerationCoM','true')
+
+robot.control.unplug()
+
+# --- Task Dyn -----------------------------------------
+# Task right hand
+task=MetaTaskDyn6d('rh',dyn,'task')
+task.ref = ((0,0,-1,0.22),(0,1,0,-0.37),(1,0,0,.74),(0,0,0,1))
+
+# Task LFoot: Move the right foot up.
+taskLF=MetaTaskDyn6d('lf',dyn,'lf','left-ankle')
+taskLF.ref = ((1,0,0,0.0),(0,1,0,+0.29),(0,0,1,.15),(0,0,0,1))
+
+# --- TASK COM ------------------------------------------------------
+dyn.setProperty('ComputeCoM','true')
+
+featureCom    = FeatureGeneric('featureCom')
+featureComDes = FeatureGeneric('featureComDes')
+plug(dyn.com,featureCom.errorIN)
+plug(dyn.Jcom,featureCom.jacobianIN)
+featureCom.sdes.value = 'featureComDes'
+
+taskCom = TaskDynPD('taskCom')
+taskCom.add('featureCom')
+plug(dyn.velocity,taskCom.qdot)
+taskCom.dt.value = 1e-3
+
+gCom = GainAdaptive('gCom')
+plug(taskCom.error,gCom.error)
+plug(gCom.gain,taskCom.controlGain)
+# Work from .04 to .09 gCom.set 1050 45 125e3
+# Good behavior gCom.set 1080 15 125e3
+# Low gains gCom.set 400 1 39e3
+# Current choice
+gCom.set(1050,45,125e3)
+
+# ---- CONTACT -----------------------------------------
+# Left foot contact
+contactLF = MetaTaskDyn6d('contact_lleg',dyn,'lf','left-ankle')
+contactLF.support = ((0.11,-0.08,-0.08,0.11),(-0.045,-0.045,0.07,0.07),(-0.105,-0.105,-0.105,-0.105))
+contactLF.feature.frame('desired')
+
+# Right foot contact
+contactRF = MetaTaskDyn6d('contact_rleg',dyn,'rf','right-ankle')
+contactRF.support = ((0.11,-0.08,-0.08,0.11),(-0.07,-0.07,0.045,0.045),(-0.105,-0.105,-0.105,-0.105))
+contactRF.feature.frame('desired')
+
+# --- SOT Dyn OpSpaceH --------------------------------------
+# SOT controller.
+sot = SolverDynReduced('sot')
+sot.setSize(robotDim-6)
+#sot.damping.value = 2e-2
+sot.breakFactor.value = 10
+
+plug(dyn.inertiaReal,sot.matrixInertia)
+plug(dyn.dynamicDrift,sot.dyndrift)
+plug(dyn.velocity,sot.velocity)
+
+plug(sot.torque,robot.control)
+plug(sot.acceleration,robot.acceleration)
+
+# --- TRACE ----------------------------------------------
+
+from dynamic_graph.tracer import *
+tr = Tracer('tr')
+tr.open('/tmp/','','.dat')
+tr.start()
+robot.after.addSignal('tr.triger')
+
+tr.add('dyn.position','')
+tr.add('sot.forces','')
+tr.add('sot.acceleration','')
+tr.add('sot.velocity','')
+robot.after.addSignal('sot.forces')
+robot.after.addSignal('sot.acceleration')
+
+tr.add('taskCom.task','')
+tr.add(contactLF.task.name+'.error','lf')
+
+# --- RUN ------------------------------------------------
+sot.addContactFromTask(contactLF.task.name,'LF')
+sot._LF_p.value = contactLF.support
+sot.addContactFromTask(contactRF.task.name,'RF')
+sot._RF_p.value = contactRF.support
+
+taskCom.controlGain.value = 100
+#featureComDes.errorIN.value = (0.06,  0.15,  0.8)
+featureComDes.errorIN.value = (0.06,  0.145,  0.8  )
+sot.push('taskCom')
+
+#@attime(5)
+def rm():
+    featureComDes.errorIN.value = dyn.com.value
+attime(500,stop,'stop')
+
+
+plug(robot.state,sot.position)
+sot.posture.value = ( 0,0,0,0,0,0,  -0.009116303,  -0.091409964,  -0.471978743,   0.840380193,  -0.470232799,   0.089662408,   0.009507818,   0.091110287,  -0.469450352,   0.835307995,  -0.467686191,  -0.093802947,  -0.000087565,   0.003264319,  -0.000007834,   0.000194743,   0.258370257,  -0.175099102,  -0.000061173,  -0.524953549,   0.000003183,  -0.000257600,  -0.000003412,   0.258367272,   0.174322098,  -0.000088902,  -0.524983691,  -0.000000346,  -0.000265401,   0.3   )
+
+matlab.prec=9
+matlab.fullPrec=0
+
+
+sot.solution.recompute(1)
+sot.acceleration.recompute(1)
+
diff --git a/unitTesting/CMakeLists.txt b/unitTesting/CMakeLists.txt
index 2067ca98d23a607101668e4ae2fffcfef3d1a785..dec17e2105a9ab538e97c690deeb484e3b5b4b3e 100644
--- a/unitTesting/CMakeLists.txt
+++ b/unitTesting/CMakeLists.txt
@@ -28,6 +28,7 @@ FOREACH(test ${tests})
     )
 
   PKG_CONFIG_USE_DEPENDENCY(${EXECUTABLE_NAME} sot-core)
+  PKG_CONFIG_USE_DEPENDENCY(${EXECUTABLE_NAME} soth)
 
   IF(${test}_plugins_dependencies)
     ADD_DEPENDENCIES(${EXECUTABLE_NAME} "${${test}_plugins_dependencies}")
diff --git a/unitTesting/dummy.cpp b/unitTesting/dummy.cpp
index 36c7edf9a640a5cdfe7a2609f9d6bf8b04fb0454..103271522591f7cc058a488c09cfb3cae12758f4 100644
--- a/unitTesting/dummy.cpp
+++ b/unitTesting/dummy.cpp
@@ -14,7 +14,57 @@
  * with sot-dyninvc.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <Eigen/QR>
+#include <Eigen/SVD>
+#include <iostream>
+
+
 int main (void)
 {
+  using namespace Eigen;
+  using namespace std;
+  const unsigned int n=36, m=24, p=12;
+  MatrixXd Xhi = MatrixXd::Random(n,p);
+  MatrixXd R = MatrixXd::Random(p,m);
+  MatrixXd M = Xhi*R;
+
+
+
+
+  VectorXd y = VectorXd::Random(n);
+  cout << "Here is the matrix m:" << endl << M << endl;
+  cout << "Here is the matrix y:" << endl << y << endl;
+
+  VectorXd x;
+  FullPivHouseholderQR<MatrixXd> Mqr;
+  Mqr.compute(M);
+  x = Mqr.solve(y);
+  //assert(y.isApprox(M*x));
+  cout << "Here is a solution x to the equation mx=y:" << endl << x << endl;
+
+
+
+  JacobiSVD<MatrixXd> Msvd(M, ComputeFullV|ComputeThinU);
+  cout << "sigma = " << Msvd.singularValues() << endl;
+
+  // Rank revealing
+  const int rank = (Msvd.singularValues().array() > 1e-5 ).count();
+  cout << "Rank is " << rank << endl;
+
+  x =
+    Msvd.matrixU().leftCols(rank).transpose()*y;
+  cout << "Uty = " << x << endl;
+  x =
+    Msvd.singularValues().array().head(rank).inverse().matrix().asDiagonal() *
+    Msvd.matrixU().leftCols(rank).transpose()*y;
+  cout << "SiUty = " << x << endl;
+  x =
+    Msvd.matrixV().leftCols(rank) *
+    Msvd.singularValues().array().head(rank).inverse().matrix().asDiagonal() *
+    Msvd.matrixU().leftCols(rank).transpose()*y;
+  cout << "VSiUty = " << x << endl;
+
+
 
+  return 0;
 }