Pith Number

pith:BQE6W7M4

pith:2009:BQE6W7M463UQFX4O764S5DAFT2

not attested not anchored not stored refs pending

Perturbation Analysis of a General Polytropic Homologously Collapsing Stellar Core

Yi Cao, Yu-Qing Lou

arxiv:0908.3225 v1 · 2009-08-22 · astro-ph.HE · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BQE6W7M463UQFX4O764S5DAFT2}

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	2026-05-18T02:12:24.038561Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c09eb7d9cf6e902df8effb92e8c059e8dc9e8713ec014a6f9073a4ac4485446

Aliases

arxiv: 0908.3225 · arxiv_version: 0908.3225v1 · doi: 10.48550/arxiv.0908.3225 · pith_short_12: BQE6W7M463UQ · pith_short_16: BQE6W7M463UQFX4O · pith_short_8: BQE6W7M4

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/BQE6W7M463UQFX4O764S5DAFT2 \
  | 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: 0c09eb7d9cf6e902df8effb92e8c059e8dc9e8713ec014a6f9073a4ac4485446

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63757597c2943e3665c16beaf3633115fded2be86f7207d50cc6184ec3fb5377",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-08-22T02:49:06Z",
    "title_canon_sha256": "bfc5a8e81924a776a72e7ca5b490aec01dd5d16547583f9ef4db0446ded67c34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3225",
    "kind": "arxiv",
    "version": 1
  }
}