Pith Number

pith:DGRIIYZH

pith:2009:DGRIIYZHMM7BJFEEGSJVHBLW5I

not attested not anchored not stored refs pending

Are pre-MS stars older than we thought?

N.J. Mayne, Tim Naylor

arxiv:0909.5320 v1 · 2009-09-29 · 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{DGRIIYZHMM7BJFEEGSJVHBLW5I}

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	2026-05-18T02:11:36.479027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19a2846327633e1494843493538576ea1236b100da0246f2abdb21d03295ac37

Aliases

arxiv: 0909.5320 · arxiv_version: 0909.5320v1 · doi: 10.48550/arxiv.0909.5320 · pith_short_12: DGRIIYZHMM7B · pith_short_16: DGRIIYZHMM7BJFEE · pith_short_8: DGRIIYZH

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/DGRIIYZHMM7BJFEEGSJVHBLW5I \
  | 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: 19a2846327633e1494843493538576ea1236b100da0246f2abdb21d03295ac37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a02c8b000bb78d18ab5f366dbae4f2d65f4f3ad4ed3c4de01b078977449f588b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-29T11:57:14Z",
    "title_canon_sha256": "c2472ef64ec96e57946bbd491dbb88f5a52fbae7a058c0fd9b4d13a4ed023173"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.5320",
    "kind": "arxiv",
    "version": 1
  }
}