Pith Number

pith:BRIBVF2P

pith:2022:BRIBVF2P3OXRTVXF53DE46EMOK

not attested not anchored not stored refs pending

Handling errors in four-dimensional variational data assimilation by balancing the degrees of freedom and the model constraints: A new approach

Hongqin Zhang, Min Zhao, Xiangjun Tian, Yanyan Tan, Yilong Wang, Yinhai Luo, Zhe Jin, Ziqing Zhang

arxiv:2212.09973 v1 · 2022-12-20 · 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{BRIBVF2P3OXRTVXF53DE46EMOK}

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	2026-07-05T05:27:02.251759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c501a974fdbaf19d6e5eec64e788c72829fdf959ec73df050d3e2ea7f797054

Aliases

arxiv: 2212.09973 · arxiv_version: 2212.09973v1 · doi: 10.48550/arxiv.2212.09973 · pith_short_12: BRIBVF2P3OXR · pith_short_16: BRIBVF2P3OXRTVXF · pith_short_8: BRIBVF2P

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/BRIBVF2P3OXRTVXF53DE46EMOK \
  | 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: 0c501a974fdbaf19d6e5eec64e788c72829fdf959ec73df050d3e2ea7f797054

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d018f8bc3d9cfbd9a93dae66fe3bad8323bc6ea3006dafcc000c150ea2def576",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2022-12-20T03:13:26Z",
    "title_canon_sha256": "631a94e127b82ae9693e096ac1ac70e4dbfcdc1331cb839fa653fe875a865d13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2212.09973",
    "kind": "arxiv",
    "version": 1
  }
}