Pith Number

pith:SPN74PF6

pith:2021:SPN74PF6UV7KZCSCO3S5D4TNGA

not attested not anchored not stored refs pending

Tracking Air Pollution in China: Near Real-Time PM2.5 Retrievals from Multiple Data Sources

Bo Zheng, Dan Tong, Guannan Geng, Jing Cheng, Kebin He, Qiang Zhang, Qingyang Xiao, Shigan Liu, XiaoDong Liu, Xiaomeng Huang, Yiran Peng, Yixuan Zheng

arxiv:2103.06520 v1 · 2021-03-11 · physics.ao-ph · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SPN74PF6UV7KZCSCO3S5D4TNGA}

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	2026-07-05T02:22:09.976760Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93dbfe3cbea57eac8a4276e5d1f26d3000f94c09e10922741f13ad692597500f

Aliases

arxiv: 2103.06520 · arxiv_version: 2103.06520v1 · doi: 10.48550/arxiv.2103.06520 · pith_short_12: SPN74PF6UV7K · pith_short_16: SPN74PF6UV7KZCSC · pith_short_8: SPN74PF6

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/SPN74PF6UV7KZCSCO3S5D4TNGA \
  | 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: 93dbfe3cbea57eac8a4276e5d1f26d3000f94c09e10922741f13ad692597500f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e01b24bcb4e0fa492e9ee5d8c7fd1a53e3d88e2f8da173b2e2d2594033ff2cc3",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2021-03-11T08:17:36Z",
    "title_canon_sha256": "5b478b5c0134dcedc0b3f34a47b82b440098b46104ffec09c35c5013e52101d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.06520",
    "kind": "arxiv",
    "version": 1
  }
}