Pith Number

pith:X34LKCMA

pith:2009:X34LKCMALEC3UCH2RVSYVRNQ4G

not attested not anchored not stored refs pending

The role of disc self-gravity in the formation of protostars and protostellar discs

J.H. Mayo, P.J. Armitage, W.K.M. Rice

arxiv:0911.1202 v1 · 2009-11-06 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X34LKCMALEC3UCH2RVSYVRNQ4G}

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	2026-05-18T02:10:58.932146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bef8b509805905ba08fa8d658ac5b0e1bf5de89498bc606b3ae0bc0aca9bbcec

Aliases

arxiv: 0911.1202 · arxiv_version: 0911.1202v1 · doi: 10.48550/arxiv.0911.1202 · pith_short_12: X34LKCMALEC3 · pith_short_16: X34LKCMALEC3UCH2 · pith_short_8: X34LKCMA

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/X34LKCMALEC3UCH2RVSYVRNQ4G \
  | 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: bef8b509805905ba08fa8d658ac5b0e1bf5de89498bc606b3ae0bc0aca9bbcec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38c39e220a14e0c5cb1e43c6036e51fd62324a207414e4bf49e260b66513ab4d",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-11-06T10:29:03Z",
    "title_canon_sha256": "8e8629ad8445d7559bf027b58c9e507836e6bffb6b4132597cd33ff1483da8d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1202",
    "kind": "arxiv",
    "version": 1
  }
}