NVIDIA/physicsnemo

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• 🐛[BUG]: MHD_PDE equation "B_grad_u" uses v * Bx.diff(y) instead of By * u.diff(y)

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  Difficulty 1/5 Under an hour Newbie friendliness 92/100

  NVIDIA/physicsnemo#2021 · Opened Sep 28, 2026

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• 🐛[BUG]: Diffusion(time=True) in darcy_physics_informed/utils.py silently drops the time-derivative term

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  Difficulty 2/5 1-3 hours Newbie friendliness 88/100

  NVIDIA/physicsnemo#2020 · Opened Sep 28, 2026

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• Checkpoint loading can mix model weights and training state from different epochs

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  NVIDIA/physicsnemo#2012 · Opened Sep 19, 2026

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• 🐛[BUG]: power_spectrum in metrics.general puts the zero frequency half a cell off along an odd width

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  Difficulty 2/5 1-3 hours Newbie friendliness 45/100

  NVIDIA/physicsnemo#2007 · 1 comment · Opened Sep 18, 2026

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• 🐛[BUG]: cdf in metrics.general.histogram drops earlier inputs from the last cumulative bin

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  Difficulty 2/5 1-3 hours Newbie friendliness 35/100

  NVIDIA/physicsnemo#2005 · Opened Sep 18, 2026

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• 🐛[BUG]: Variance in metrics.general.ensemble_metrics ignores the dim argument

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  Difficulty 3/5 1-2 days Newbie friendliness 48/100

  NVIDIA/physicsnemo#2003 · Opened Sep 18, 2026

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• GradientsFiniteDifference/GradientsSpectral (and PhysicsInformer) silently assume a periodic domain — non-periodic BCs get a wrong residual at the boundary with no warning

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  Difficulty 3/5 1-2 days Newbie friendliness 68/100

  NVIDIA/physicsnemo#2001 · 1 comment · Opened Sep 17, 2026

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• 🐛[BUG]: AeroJEPA ignores unbatched TokenSet masks and decode_field_chunked accepts invalid arguments

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  Difficulty 4/5 3-5 days Newbie friendliness 68/100

  NVIDIA/physicsnemo#1998 · Opened Sep 17, 2026

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• 🐛[BUG]: torch.compile + ShardTensor failures with regional model recipe

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  Difficulty 5/5 Over a week Newbie friendliness 32/100

  NVIDIA/physicsnemo#1986 · 3 comments · Opened Sep 11, 2026

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• DistributedManager initialization fails on CPU-only hosts

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  Difficulty 4/5 3-5 days Newbie friendliness 68/100

  NVIDIA/physicsnemo#1936 · Opened Aug 19, 2026

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• DiffusionUNet3D cannot run under torch.autocast (amp_mode is not exposed)

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  Difficulty 3/5 1-2 days Newbie friendliness 72/100

  NVIDIA/physicsnemo#1935 · Opened Aug 19, 2026

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• 🐛[BUG]: DefaultTrainingLoop performs two optimizer steps per minibatch with static capture

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  Difficulty 3/5 1-2 days Newbie friendliness 78/100

  NVIDIA/physicsnemo#1911 · Opened Aug 12, 2026

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• 🚀[FEA]: Add non-periodic boundary mode to grid-gradient operators

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  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  NVIDIA/physicsnemo#1852 · 1 comment · Opened Jul 17, 2026

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• 🚀[FEA]: PhysicsNeMo-Mesh Code Cleanups

  May be free again @peterdsharpe claimed this 74 days ago, and no pull request is open. Open

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  1 - On Deck enhancement

  NVIDIA/physicsnemo#1851 · 1 comment · 1 assignee · Opened Jul 17, 2026

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• ShardTensor is not torch.compile-able: graph break in from_local resumes mid-construction before _spec is attached

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  Difficulty 5/5 Over a week Newbie friendliness 35/100

  NVIDIA/physicsnemo#1796 · 2 comments · Opened Jul 6, 2026

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• 🚀[FEA]: allow control over checkpoint filename format in `save_checkoint`

  May be free again @CharlelieLrt claimed this 341 days ago, and no pull request is open. Open

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  enhancement

  NVIDIA/physicsnemo#1175 · 5 comments · 1 assignee · Opened Oct 23, 2025

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• 🚀[FEA]: allow renaming state-dict keys in from_checkpoint when loading backward-compatible checkpoints

  May be free again @CharlelieLrt claimed this 341 days ago, and no pull request is open. Open

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  enhancement

  NVIDIA/physicsnemo#1173 · 5 comments · 1 assignee · Opened Oct 23, 2025

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• 🐛[BUG]: ValueError: infer_schema(func) in @torch.library.custom_op due to stringified type annotations (from __future__ import annotations)

  Possibly taken @loliverhennigh claimed this 13 days ago. Open

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  NVIDIA/physicsnemo#1990 · 1 assignee · Opened Sep 14, 2026

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