Pith Number

pith:CAYJAU5F

pith:2026:CAYJAU5FJNAZJHHQ2DGOR4WOOQ

not attested not anchored not stored refs pending

Nowcasting PM2.5 in Beijing Using Synchronous Covariates and Lagged Features: Model Comparison and Variable Selection Stability

Ruiyan Du, Yusheng Wang

arxiv:2607.07279 v1 · 2026-07-08 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CAYJAU5FJNAZJHHQ2DGOR4WOOQ}

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	2026-07-09T01:20:19.762444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10309053a54b41949cf0d0cce8f2ce740a7e72bb23b671c9e9d64af4b2ecdc0f

Aliases

arxiv: 2607.07279 · arxiv_version: 2607.07279v1 · doi: 10.48550/arxiv.2607.07279 · pith_short_12: CAYJAU5FJNAZ · pith_short_16: CAYJAU5FJNAZJHHQ · pith_short_8: CAYJAU5F

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/CAYJAU5FJNAZJHHQ2DGOR4WOOQ \
  | 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: 10309053a54b41949cf0d0cce8f2ce740a7e72bb23b671c9e9d64af4b2ecdc0f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "973853f0e5da4fcc6642040170b08482375825bebb694e7ac9e24f41ed348a66",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2026-07-08T11:14:45Z",
    "title_canon_sha256": "c51a9089531c007ab88e9e9eb64fe464838f8a6cc8521dd53d3ad7ad4454df45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.07279",
    "kind": "arxiv",
    "version": 1
  }
}