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Add support for complex number subtraction #526

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Dec 13, 2022
Merged

Add support for complex number subtraction #526

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8 changes: 5 additions & 3 deletions spec/API_specification/array_api/array_object.py
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Original file line number Diff line number Diff line change
Expand Up @@ -914,14 +914,16 @@ def __setitem__(self: array, key: Union[int, slice, ellipsis, Tuple[Union[int, s

def __sub__(self: array, other: Union[int, float, array], /) -> array:
"""
Calculates the difference for each element of an array instance with the respective element of the array ``other``. The result of ``self_i - other_i`` must be the same as ``self_i + (-other_i)`` and must be governed by the same floating-point rules as addition (see :meth:`array.__add__`).
Calculates the difference for each element of an array instance with the respective element of the array ``other``.

The result of ``self_i - other_i`` must be the same as ``self_i + (-other_i)`` and must be governed by the same floating-point rules as addition (see :meth:`array.__add__`).

Parameters
----------
self: array
array instance (minuend array). Should have a real-valued data type.
array instance (minuend array). Should have a numeric data type.
other: Union[int, float, array]
subtrahend array. Must be compatible with ``self`` (see :ref:`broadcasting`). Should have a real-valued data type.
subtrahend array. Must be compatible with ``self`` (see :ref:`broadcasting`). Should have a numeric data type.

Returns
-------
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8 changes: 5 additions & 3 deletions spec/API_specification/array_api/elementwise_functions.py
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Expand Up @@ -1535,14 +1535,16 @@ def sqrt(x: array, /) -> array:

def subtract(x1: array, x2: array, /) -> array:
"""
Calculates the difference for each element ``x1_i`` of the input array ``x1`` with the respective element ``x2_i`` of the input array ``x2``. The result of ``x1_i - x2_i`` must be the same as ``x1_i + (-x2_i)`` and must be governed by the same floating-point rules as addition (see :meth:`add`).
Calculates the difference for each element ``x1_i`` of the input array ``x1`` with the respective element ``x2_i`` of the input array ``x2``.

The result of ``x1_i - x2_i`` must be the same as ``x1_i + (-x2_i)`` and must be governed by the same floating-point rules as addition (see :meth:`add`).

Parameters
----------
x1: array
first input array. Should have a real-valued data type.
first input array. Should have a numeric data type.
x2: array
second input array. Must be compatible with ``x1`` (see :ref:`broadcasting`). Should have a real-valued data type.
second input array. Must be compatible with ``x1`` (see :ref:`broadcasting`). Should have a numeric data type.

Returns
-------
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