Matrix.gram_schmidt: Use sage.rings.abc (fixup)

sagemath · Oct 8, 2021 · 6d4ee6e · 6d4ee6e
1 parent ac58286
commit 6d4ee6e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/sage/matrix/matrix2.pyx b/src/sage/matrix/matrix2.pyx
@@ -10647,7 +10647,7 @@ cdef class Matrix(Matrix1):
             True
         """
         R = self.base_ring()
-        if instance(R, (sage.rings.abc.RealDoubleField, sage.rings.abc.ComplexDoubleField)):
+        if isinstance(R, (sage.rings.abc.RealDoubleField, sage.rings.abc.ComplexDoubleField)):
             Q, R = self.transpose().QR()
             m = R.nrows(); n = R.ncols()
             if m > n: