ENH: add hermitian=False kwarg to matrix_power

With a symmetric matrix, the more efficient `eigvalsh` method
can be used to find singular values.

1 files changed, 6 insertions, 0 deletions

diff --git a/doc/release/1.14.0-notes.rst b/doc/release/1.14.0-notes.rst
index b961f3cb2..3bb8bf794 100644
--- a/doc/release/1.14.0-notes.rst
+++ b/doc/release/1.14.0-notes.rst
@@ -241,6 +241,12 @@ Changes
 0d arrays now use the array2string formatters to print their elements, like
 other arrays. The ``style`` argument of ``array2string`` is now non-functional.
 
+``np.linalg.matrix_rank`` is more efficient for hermitian matrices
+------------------------------------------------------------------
+The keyword argument ``hermitian`` was added to toggle between standard
+SVD-based matrix rank calculation and the more efficient eigenvalue-based
+method for symmetric/hermitian matrices.
+
 Integer scalars are now unaffected by ``np.set_string_function``
 ----------------------------------------------------------------
 Previously the str/repr of integer scalars could be controlled by