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Unexpected NaN gradient of jnp.abs at ±inf + 0j #25681

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lfaucheux opened this issue Dec 24, 2024 · 0 comments
Open

Unexpected NaN gradient of jnp.abs at ±inf + 0j #25681

lfaucheux opened this issue Dec 24, 2024 · 0 comments
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lfaucheux commented Dec 24, 2024 •
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Description

I am getting unexpected nan gradient with the following example.

>>> import jax
>>> (g := jax.grad(jax.numpy.abs))(float('inf') + 0j)
Array(nan+nanj, dtype=complex128)
# >>> g(float('inf'))
# Array(1., dtype=float64, weak_type=True)

What jax/jaxlib version are you using?

jax v0.4.38, jaxlib v0.4.38 numpy v1.26.4

Which accelerator(s) are you using?

CPU

Additional system info?

Python 3.11, Windows

NVIDIA GPU info

No response
@lfaucheux lfaucheux added the bug Something isn't working label Dec 24, 2024
@lfaucheux lfaucheux changed the title Unexpected NaN gradient of jnp.abs at inf + 0j Unexpected NaN gradient of jnp.abs at ±inf + 0j Dec 24, 2024
@dfm dfm self-assigned this Dec 29, 2024
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@dfm @lfaucheux