AugLagrangianFunction<LagrangianFunction>::AugLagrangianFunction(
    LagrangianFunction& function) :
    function(function),
    lambda(function.NumConstraints()),
    sigma(10)
{
  // Nothing else to do.
}
AugLagrangianFunction<LagrangianFunction>::AugLagrangianFunction(
    LagrangianFunction& function) :
    function(function),
    lambda(function.NumConstraints()),
    sigma(10)
{
  // Initialize lambda vector to all zeroes.
  lambda.zeros();
}