Remove \nonstable yet. The stability rules for Eigen3 are much simpler:

- all what's not in unsupported/ is considered stable API
    (except internal stuff e.g. expression templates).

Eigen/src/Core/BandMatrix.h

@@ -25,7 +25,7 @@
 #ifndef EIGEN_BANDMATRIX_H
 #define EIGEN_BANDMATRIX_H
 
-/** \nonstableyet
+/**
   * \class BandMatrix
   *
   * \brief Represents a rectangular matrix with a banded storage
@@ -203,7 +203,7 @@ class BandMatrix : public EigenBase<BandMatrix<_Scalar,Rows,Cols,Supers,Subs,Opt
     ei_variable_if_dynamic<Index, Subs>   m_subs;
 };
 
-/** \nonstableyet
+/**
   * \class TridiagonalMatrix
   *
   * \brief Represents a tridiagonal matrix

Eigen/src/Core/Replicate.h

@@ -25,7 +25,7 @@
 #ifndef EIGEN_REPLICATE_H
 #define EIGEN_REPLICATE_H
 
-/** \nonstableyet
+/**
   * \class Replicate
   *
   * \brief Expression of the multiple replication of a matrix or vector
@@ -125,7 +125,7 @@ template<typename MatrixType,int RowFactor,int ColFactor> class Replicate
     const ei_variable_if_dynamic<Index, ColFactor> m_colFactor;
 };
 
-/** \nonstableyet
+/**
   * \return an expression of the replication of \c *this
   *
   * Example: \include MatrixBase_replicate.cpp
@@ -141,7 +141,7 @@ DenseBase<Derived>::replicate() const
   return Replicate<Derived,RowFactor,ColFactor>(derived());
 }
 
-/** \nonstableyet
+/**
   * \return an expression of the replication of \c *this
   *
   * Example: \include MatrixBase_replicate_int_int.cpp
@@ -156,7 +156,7 @@ DenseBase<Derived>::replicate(Index rowFactor,Index colFactor) const
   return Replicate<Derived,Dynamic,Dynamic>(derived(),rowFactor,colFactor);
 }
 
-/** \nonstableyet
+/**
   * \return an expression of the replication of each column (or row) of \c *this
   *
   * Example: \include DirectionWise_replicate_int.cpp

Eigen/src/Core/SelfAdjointView.h

@@ -26,7 +26,7 @@
 #define EIGEN_SELFADJOINTMATRIX_H
 
 /** \class SelfAdjointView
-  * \nonstableyet
+  *
   *
   * \brief Expression of a selfadjoint matrix from a triangular part of a dense matrix
   *

Eigen/src/Core/SolveTriangular.h

@@ -234,7 +234,7 @@ struct ei_triangular_solver_selector<Lhs,Rhs,OnTheLeft,Mode,CompleteUnrolling,St
 
 /** "in-place" version of TriangularView::solve() where the result is written in \a other
   *
-  * \nonstableyet
+  *
   *
   * \warning The parameter is only marked 'const' to make the C++ compiler accept a temporary expression here.
   * This function will const_cast it, so constness isn't honored here.
@@ -265,7 +265,7 @@ void TriangularView<MatrixType,Mode>::solveInPlace(const MatrixBase<OtherDerived
 
 /** \returns the product of the inverse of \c *this with \a other, \a *this being triangular.
   *
-  * \nonstableyet
+  *
   *
   * This function computes the inverse-matrix matrix product inverse(\c *this) * \a other.
   * The matrix \c *this must be triangular and invertible (i.e., all the coefficients of the

Eigen/src/Core/TriangularMatrix.h

@@ -621,7 +621,7 @@ EIGEN_DEPRECATED TriangularView<Derived, Mode> MatrixBase<Derived>::part()
   return derived();
 }
 
-/** \nonstableyet
+/**
   * \returns an expression of a triangular view extracted from the current matrix
   *
   * The parameter \a Mode can have the following values: \c Upper, \c StrictlyUpper, \c UnitUpper,

Eigen/src/Core/VectorwiseOp.h

@@ -388,7 +388,7 @@ template<typename ExpressionType, int Direction> class VectorwiseOp
     typedef Replicate<ExpressionType,Direction==Vertical?Dynamic:1,Direction==Horizontal?Dynamic:1> ReplicateReturnType;
     const ReplicateReturnType replicate(Index factor) const;
 
-    /** \nonstableyet
+    /**
       * \return an expression of the replication of each column (or row) of \c *this
       *
       * Example: \include DirectionWise_replicate.cpp