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Add complex number support to isnan #532

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Dec 5, 2022
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Add complex number support to isnan #532

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16 changes: 14 additions & 2 deletions spec/API_specification/array_api/elementwise_functions.py
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Expand Up @@ -858,15 +858,27 @@ def isnan(x: array, /) -> array:
"""
Tests each element ``x_i`` of the input array ``x`` to determine whether the element is ``NaN``.

**Special Cases**

For real-valued floating-point operands,

- If ``x_i`` is ``NaN``, the result is ``True``.
- In the remaining cases, the result is ``False``.

For complex floating-point operands, let ``a = real(x_i)``, ``b = imag(x_i)``, and

- If ``a`` or ``b`` is ``NaN``, the result is ``True``.
- In the remaining cases, the result is ``False``.

Parameters
----------
x: array
input array. Should have a real-valued data type.
input array. Should have a numeric data type.

Returns
-------
out: array
an array containing test results. An element ``out_i`` is ``True`` if ``x_i`` is ``NaN`` and ``False`` otherwise. The returned array should have a data type of ``bool``.
an array containing test results. The returned array should have a data type of ``bool``.
"""

def less(x1: array, x2: array, /) -> array:
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