diff --git a/Eigen/src/Core/ArithmeticSequence.h b/Eigen/src/Core/ArithmeticSequence.h
index 055beab..ae3fac3 100644
--- a/Eigen/src/Core/ArithmeticSequence.h
+++ b/Eigen/src/Core/ArithmeticSequence.h
@@ -229,7 +229,7 @@
 template <typename FirstType, typename SizeType, typename IncrType>
 constexpr Index get_runtime_incr(const ArithmeticSequence<FirstType, SizeType, IncrType>& x) EIGEN_NOEXCEPT {
   return static_cast<Index>(x.incrObject());
-};
+}
 
 }  // end namespace internal
 
diff --git a/Eigen/src/Core/util/IndexedViewHelper.h b/Eigen/src/Core/util/IndexedViewHelper.h
index 00018a9..9d1b348 100644
--- a/Eigen/src/Core/util/IndexedViewHelper.h
+++ b/Eigen/src/Core/util/IndexedViewHelper.h
@@ -70,7 +70,7 @@
 template <typename T>
 constexpr Index get_runtime_incr(const T&) EIGEN_NOEXCEPT {
   return Index(1);
-};
+}
 
 // Analogue of std::get<0>(x), but tailored for our needs.
 template <typename T>
diff --git a/Eigen/src/QR/ColPivHouseholderQR.h b/Eigen/src/QR/ColPivHouseholderQR.h
index bd0849d..092c29d 100644
--- a/Eigen/src/QR/ColPivHouseholderQR.h
+++ b/Eigen/src/QR/ColPivHouseholderQR.h
@@ -438,7 +438,6 @@
 
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::Scalar ColPivHouseholderQR<MatrixType, PermutationIndex>::determinant() const {
-  using Scalar = typename MatrixType::Scalar;
   eigen_assert(m_isInitialized && "HouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
   Scalar detQ;
@@ -449,7 +448,6 @@
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::RealScalar ColPivHouseholderQR<MatrixType, PermutationIndex>::absDeterminant() const {
   using std::abs;
-  using RealScalar = typename MatrixType::RealScalar;
   eigen_assert(m_isInitialized && "ColPivHouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
   return isInjective() ? abs(m_qr.diagonal().prod()) : RealScalar(0);
@@ -457,7 +455,6 @@
 
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::RealScalar ColPivHouseholderQR<MatrixType, PermutationIndex>::logAbsDeterminant() const {
-  using RealScalar = typename MatrixType::RealScalar;
   eigen_assert(m_isInitialized && "ColPivHouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
   return isInjective() ? m_qr.diagonal().cwiseAbs().array().log().sum() : -NumTraits<RealScalar>::infinity();
@@ -465,7 +462,6 @@
 
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::Scalar ColPivHouseholderQR<MatrixType, PermutationIndex>::signDeterminant() const {
-  using Scalar = typename MatrixType::Scalar;
   eigen_assert(m_isInitialized && "ColPivHouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
   Scalar detQ;
diff --git a/Eigen/src/QR/FullPivHouseholderQR.h b/Eigen/src/QR/FullPivHouseholderQR.h
index 0cadf23..cae9ae4 100644
--- a/Eigen/src/QR/FullPivHouseholderQR.h
+++ b/Eigen/src/QR/FullPivHouseholderQR.h
@@ -435,7 +435,6 @@
 
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::Scalar FullPivHouseholderQR<MatrixType, PermutationIndex>::determinant() const {
-  using Scalar = typename MatrixType::Scalar;
   eigen_assert(m_isInitialized && "HouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
   Scalar detQ;
@@ -445,7 +444,6 @@
 
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::RealScalar FullPivHouseholderQR<MatrixType, PermutationIndex>::absDeterminant() const {
-  using RealScalar = typename MatrixType::RealScalar;
   using std::abs;
   eigen_assert(m_isInitialized && "FullPivHouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
@@ -454,7 +452,6 @@
 
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::RealScalar FullPivHouseholderQR<MatrixType, PermutationIndex>::logAbsDeterminant() const {
-  using RealScalar = typename MatrixType::RealScalar;
   eigen_assert(m_isInitialized && "FullPivHouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
   return isInjective() ? m_qr.diagonal().cwiseAbs().array().log().sum() : -NumTraits<RealScalar>::infinity();
@@ -462,7 +459,6 @@
 
 template <typename MatrixType, typename PermutationIndex>
 typename MatrixType::Scalar FullPivHouseholderQR<MatrixType, PermutationIndex>::signDeterminant() const {
-  using Scalar = typename MatrixType::Scalar;
   eigen_assert(m_isInitialized && "FullPivHouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
   Scalar detQ;