Pith Number

pith:EJ7PPTII

pith:1999:EJ7PPTII5MZXZEKZ2OPIYVOUQW

not attested not anchored not stored refs pending

Zero-Metallicity Stars and the Effects of the First Stars on Reionization

Jason Tumlinson, J. Michael Shull

arxiv:astro-ph/9911339 v1 · 1999-11-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EJ7PPTII5MZXZEKZ2OPIYVOUQW}

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	2026-05-18T01:07:35.794125Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

227ef7cd08eb337c9159d39e8c55d485a3788e6252d649c2cea064883b9c2fcd

Aliases

arxiv: astro-ph/9911339 · arxiv_version: astro-ph/9911339v1 · doi: 10.48550/arxiv.astro-ph/9911339 · pith_short_12: EJ7PPTII5MZX · pith_short_16: EJ7PPTII5MZXZEKZ · pith_short_8: EJ7PPTII

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/EJ7PPTII5MZXZEKZ2OPIYVOUQW \
  | 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: 227ef7cd08eb337c9159d39e8c55d485a3788e6252d649c2cea064883b9c2fcd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d738466f7d8f1456dc6ff3bbca6d1bdd2313b99acf1ad32cbebffbfe2ce10c0b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-11-17T17:18:09Z",
    "title_canon_sha256": "59f444cdc7daadc3ec925ea868f8bf517573b1c1947c22b182d5fa269a3b4429"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9911339",
    "kind": "arxiv",
    "version": 1
  }
}