Pith Number

pith:7IEMQQ5C

pith:2009:7IEMQQ5CTZVOYNRDVUFPTO3W5F

not attested not anchored not stored refs pending

The Formation of Massive Star Systems by Accretion

Andrew J. Cunningham, Christopher F. McKee, Mark R. Krumholz, Richard I. Klein, Stella S. R. Offner

arxiv:0901.3157 v1 · 2009-01-20 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7IEMQQ5CTZVOYNRDVUFPTO3W5F}

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	2026-05-18T04:28:21.903689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa08c843a29e6aec3623ad0af9bb76e9430881a0de6e522a7334ac3bc56d0e0d

Aliases

arxiv: 0901.3157 · arxiv_version: 0901.3157v1 · doi: 10.48550/arxiv.0901.3157 · pith_short_12: 7IEMQQ5CTZVO · pith_short_16: 7IEMQQ5CTZVOYNRD · pith_short_8: 7IEMQQ5C

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/7IEMQQ5CTZVOYNRDVUFPTO3W5F \
  | 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: fa08c843a29e6aec3623ad0af9bb76e9430881a0de6e522a7334ac3bc56d0e0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6ee70ca3f7a058afda2b6def7b54ae15ae5a99de538fbedce01754c9fd249a5",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-01-20T21:09:14Z",
    "title_canon_sha256": "da4c71a83f7b06d8c1431cdf9cd44a88128919310f3065034806575fe43baec5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.3157",
    "kind": "arxiv",
    "version": 1
  }
}