Pith Number

pith:3M5JDO7Z

pith:2020:3M5JDO7ZXATD5GTNMSJRLHMOWM

not attested not anchored not stored refs pending

Spring Festival points the way to cleaner air in China

David G. Streets, Hang Su, Kebin He, Meinrat O. Andreae, Qiang Zhang, Siwen Wang, Ulrich P\"oschl, Yafang Cheng, Zifeng Lu

arxiv:2004.08442 v2 · 2020-04-17 · physics.ao-ph · physics.geo-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{3M5JDO7ZXATD5GTNMSJRLHMOWM}

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	2026-07-05T00:59:58.336917Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db3a91bbf9b8263e9a6d6493159d8eb321974a04811121b74438f7e70e77b01f

Aliases

arxiv: 2004.08442 · arxiv_version: 2004.08442v2 · doi: 10.48550/arxiv.2004.08442 · pith_short_12: 3M5JDO7ZXATD · pith_short_16: 3M5JDO7ZXATD5GTN · pith_short_8: 3M5JDO7Z

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/3M5JDO7ZXATD5GTNMSJRLHMOWM \
  | 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: db3a91bbf9b8263e9a6d6493159d8eb321974a04811121b74438f7e70e77b01f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3b95717ec7f2e3f1f91fb674e2df091ab73299adbdffc05f0d3d605ceabbc8f",
    "cross_cats_sorted": [
      "physics.geo-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2020-04-17T20:31:12Z",
    "title_canon_sha256": "6f3a8c43983cf496999baed5834d1359c6460d7f5470211cc45cfa2b45337f89"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.08442",
    "kind": "arxiv",
    "version": 2
  }
}