Pith Number

pith:VNNBW2XR

pith:2009:VNNBW2XRIN7LFB2LWYMCPMTYSR

not attested not anchored not stored refs pending

The Evolution of Density Structure of Starless and Protostellar Cores

Chao-Ling Hung, Chi-Hung Yan, Shih-Ping Lai

arxiv:0912.4738 v1 · 2009-12-23 · 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{VNNBW2XRIN7LFB2LWYMCPMTYSR}

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.

Cited by

1 paper in Pith

CARPP: Parametric Radiative-Transfer Fitting of Molecular Cores from Dust Continuum Data

Receipt and verification

First computed	2026-05-18T02:33:55.435878Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab5a1b6af1437eb2874bb61827b278944ee725cd2abbab942245c32668caf0f5

Aliases

arxiv: 0912.4738 · arxiv_version: 0912.4738v1 · doi: 10.48550/arxiv.0912.4738 · pith_short_12: VNNBW2XRIN7L · pith_short_16: VNNBW2XRIN7LFB2L · pith_short_8: VNNBW2XR

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/VNNBW2XRIN7LFB2LWYMCPMTYSR \
  | 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: ab5a1b6af1437eb2874bb61827b278944ee725cd2abbab942245c32668caf0f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "908edaaf7b9f87a6f240f6af9a54ebc45dab01e1a724cf91fc83fd902653a0cb",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-12-23T21:06:30Z",
    "title_canon_sha256": "db9b4faf4f7a884fc6ef072421a9ca49bf78d58b0dc4481637e8a4f0b688af2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4738",
    "kind": "arxiv",
    "version": 1
  }
}