Pith Number

pith:NDP7E3ZX

pith:2024:NDP7E3ZX2WD55YVTM4PMRQCESU

not attested not anchored not stored refs pending

U-Net Kalman Filter (UNetKF): An Example of Machine Learning-assisted Ensemble Data Assimilation

Feiyu Lu

arxiv:2403.12366 v1 · 2024-03-19 · cs.LG · physics.ao-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDP7E3ZX2WD55YVTM4PMRQCESU}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T07:58:00.227021Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68dff26f37d587dee2b3671ec8c0449512e7675baf20820515b49f6b4742d8b2

Aliases

arxiv: 2403.12366 · arxiv_version: 2403.12366v1 · doi: 10.48550/arxiv.2403.12366 · pith_short_12: NDP7E3ZX2WD5 · pith_short_16: NDP7E3ZX2WD55YVT · pith_short_8: NDP7E3ZX

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NDP7E3ZX2WD55YVTM4PMRQCESU \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 68dff26f37d587dee2b3671ec8c0449512e7675baf20820515b49f6b4742d8b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "109e7497b8ad59c4825b173fff5681d0ac1c80f87f0aa022120438ce9df095aa",
    "cross_cats_sorted": [
      "physics.ao-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2024-03-19T02:23:12Z",
    "title_canon_sha256": "6d2c301e94ac550e154ea9f1768b198bb84e97eec8c7ec8f2209469d046342a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2403.12366",
    "kind": "arxiv",
    "version": 1
  }
}