small mistakes

sagemath · Jun 13, 2020 · 2a08abe · 2a08abe
1 parent bf0352f
commit 2a08abe
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/src/sage/matrix/matrix_generic_sparse.pyx b/src/sage/matrix/matrix_generic_sparse.pyx
@@ -214,7 +214,7 @@ cdef class Matrix_generic_sparse(matrix_sparse.Matrix_sparse):
             [1 0 0 0]
             [0 0 0 1]
         """
-        return (i,j) in self._entries
+        return (i,j) not in self._entries
 
     def _pickle(self):
         version = 0

diff --git a/src/sage/matrix/matrix_gf2e_dense.pyx b/src/sage/matrix/matrix_gf2e_dense.pyx
@@ -736,7 +736,9 @@ cdef class Matrix_gf2e_dense(matrix_dense.Matrix_dense):
             sage: bool(zero)
             False
         """
-        return not mzed_is_zero(self._entries)
+        if self._nrows and self._ncols:
+            return not mzed_is_zero(self._entries)
+        return False
 
     def _list(self):
         """