Pith Number

pith:HJHLZ77F

pith:2009:HJHLZ77FR7OB7KC2IFPV3KHG4Z

not attested not anchored not stored refs pending

Dynamics of the Universe in Problems

D. A. Yerokhin, G. I. Ivashkevych, I. V. Tanatarov, O. A. Lemets, V. A. Cherkaskiy, Yu. L. Bolotin

arxiv:0904.0382 v9 · 2009-04-02 · astro-ph.CO · physics.pop-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{HJHLZ77FR7OB7KC2IFPV3KHG4Z}

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	2026-05-18T02:50:13.899531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a4ebcffe58fdc1fa85a415f5da8e6e67bb99faf9c55e18f75f8a851db15cffc

Aliases

arxiv: 0904.0382 · arxiv_version: 0904.0382v9 · doi: 10.48550/arxiv.0904.0382 · pith_short_12: HJHLZ77FR7OB · pith_short_16: HJHLZ77FR7OB7KC2 · pith_short_8: HJHLZ77F

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/HJHLZ77FR7OB7KC2IFPV3KHG4Z \
  | 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: 3a4ebcffe58fdc1fa85a415f5da8e6e67bb99faf9c55e18f75f8a851db15cffc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74b11dca2de0be8a5a9c5ad80b577e5e272b7498a2f52428d772d0038f8be283",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-02T13:09:27Z",
    "title_canon_sha256": "f147b5a23103bb617319887d8a4fda76c40e947a80dc98ac2cc93b30d1f0c844"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0382",
    "kind": "arxiv",
    "version": 9
  }
}