Pith Number

pith:XZN4RBN5

pith:2026:XZN4RBN5FC6XE32XFAI2OF3QJ4

not attested not anchored not stored refs pending

A Two-Step Ensemble Score Filter for Data Assimilation in Partially Observed Systems

Feng Bao, Guannan Zhang, Hristo G. Chipilski, Jingqiao Tang, Siming Liang, Zixiang Xiong

arxiv:2606.28264 v1 · 2026-06-26 · 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{XZN4RBN5FC6XE32XFAI2OF3QJ4}

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	2026-06-29T01:15:10.774896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be5bc885bd28bd726f572811a717704f13df3e0e44b3f753e9d38836b388cc24

Aliases

arxiv: 2606.28264 · arxiv_version: 2606.28264v1 · doi: 10.48550/arxiv.2606.28264 · pith_short_12: XZN4RBN5FC6X · pith_short_16: XZN4RBN5FC6XE32X · pith_short_8: XZN4RBN5

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/XZN4RBN5FC6XE32XFAI2OF3QJ4 \
  | 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: be5bc885bd28bd726f572811a717704f13df3e0e44b3f753e9d38836b388cc24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4efe746acf2ea42c238c76db91c7086585ab5135905a887d9b892af7769c665",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2026-06-26T16:55:42Z",
    "title_canon_sha256": "ecd04f076b93bc7bb94f92c0fe07573456cc565fbbabe876dede60069034fe6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.28264",
    "kind": "arxiv",
    "version": 1
  }
}