implement dpnp.nanargmax, dpnp.nanargmin, dpnp.nanmax, and dpnp.nanmin (#1646)

* implement nanargmax, nanargmin, nanmax, nanmin

* address comments

* suppress overflow warning

Author: vtavana

dpnp/dpnp_iface_mathematical.py

@@ -133,8 +133,8 @@ def _append_to_diff_array(a, axis, combined, values):
 
     Scalar value (including case with 0d array) is expanded to an array
     with length=1 in the direction of axis and the shape of the input array `a`
-    in along all other axes.
-    Note, if `values` is a scalar. then it is converted to 0d array allocating
+    along all other axes.
+    Note, if `values` is a scalar, then it is converted to 0d array allocating
     on the same SYCL queue as the input array `a` and with the same USM type.
 
     """
@@ -1132,7 +1132,9 @@ def fmax(x1, x2, /, out=None, *, where=True, dtype=None, subok=True, **kwargs):
     See Also
     --------
     :obj:`dpnp.maximum` : Element-wise maximum of array elements, propagates NaNs.
-    :obj:`dpnp.fmin` : Element-wise minimum of array elements, ignore NaNs.
+    :obj:`dpnp.fmin` : Element-wise minimum of array elements, ignores NaNs.
+    :obj:`dpnp.max` : The maximum value of an array along a given axis, propagates NaNs..
+    :obj:`dpnp.nanmax` : The maximum value of an array along a given axis, ignores NaNs.
     :obj:`dpnp.minimum` : Element-wise minimum of array elements, propagates NaNs.
     :obj:`dpnp.fmod` : Calculate the element-wise remainder of division.
 
@@ -1237,7 +1239,9 @@ def fmin(x1, x2, /, out=None, *, where=True, dtype=None, subok=True, **kwargs):
     See Also
     --------
     :obj:`dpnp.minimum` : Element-wise minimum of array elements, propagates NaNs.
-    :obj:`dpnp.fmax` : Element-wise maximum of array elements, ignore NaNs.
+    :obj:`dpnp.fmax` : Element-wise maximum of array elements, ignores NaNs.
+    :obj:`dpnp.min` : The minimum value of an array along a given axis, propagates NaNs.
+    :obj:`dpnp.nanmin` : The minimum value of an array along a given axis, ignores NaNs.
     :obj:`dpnp.maximum` : Element-wise maximum of array elements, propagates NaNs.
     :obj:`dpnp.fmod` : Calculate the element-wise remainder of division.