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jax.numpy.isneginf — JAX documentation

jax.numpy.isneginf(x, /, out=None)[source]#

Return boolean array indicating whether each element of input is negative infinite.

JAX implementation of numpy.isneginf.

Parameters:

x – input array or scalar. complex dtype are not supported.

Returns:

A boolean array of same shape as x containing True where x is -inf, and False otherwise.

See also

• jax.numpy.isinf(): Returns a boolean array indicating whether each element of input is either positive or negative infinity.

• jax.numpy.isposinf(): Returns a boolean array indicating whether each element of input is positive infinity.

• jax.numpy.isfinite(): Returns a boolean array indicating whether each element of input is finite.

• jax.numpy.isnan(): Returns a boolean array indicating whether each element of input is not a number (NaN).

Examples

>>> jnp.isneginf(jnp.inf)
Array(False, dtype=bool)
>>> x = jnp.array([-jnp.inf, 5, jnp.inf, jnp.nan, 1])
>>> jnp.isneginf(x)
Array([ True, False, False, False, False], dtype=bool)

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