Pith Number

pith:PDXPH4NN

pith:2012:PDXPH4NNK2XLVPVRUMYDRRX2TO

not attested not anchored not stored refs pending

The study of ground-level ozone in Kiev and its impact on public health

A. A. Veles, A. V. Shavrina, I. A. Mikulskaya, O. B. Blum, S. I. Kiforenko, V. A. Sheminova

arxiv:1204.1902 v2 · 2012-04-09 · astro-ph.EP · 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{PDXPH4NNK2XLVPVRUMYDRRX2TO}

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	2026-05-18T03:57:15.639459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78eef3f1ad56aebabeb1a33038c6fa9bb517e2031c582c6d5587f4449cabfe58

Aliases

arxiv: 1204.1902 · arxiv_version: 1204.1902v2 · doi: 10.48550/arxiv.1204.1902 · pith_short_12: PDXPH4NNK2XL · pith_short_16: PDXPH4NNK2XLVPVR · pith_short_8: PDXPH4NN

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/PDXPH4NNK2XLVPVRUMYDRRX2TO \
  | 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: 78eef3f1ad56aebabeb1a33038c6fa9bb517e2031c582c6d5587f4449cabfe58

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "949b92d8ec2d6fee6f6f1f373fad5e1a37af1afec31f3a4d1c482012f5ff60b7",
    "cross_cats_sorted": [
      "physics.ao-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2012-04-09T15:34:22Z",
    "title_canon_sha256": "38d61c75ce05e6afda227b0cf182f84ee00fdffac195f6fa21103c289f90b3e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1902",
    "kind": "arxiv",
    "version": 2
  }
}