Pith Number

pith:JFWWO2BH

pith:2009:JFWWO2BH2XAX5QEQ2O7DKGPXLU

not attested not anchored not stored refs pending

Lyman-alpha transfer in primordial hydrogen recombination

Christopher M. Hirata, John Forbes

arxiv:0903.4925 v2 · 2009-03-27 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JFWWO2BH2XAX5QEQ2O7DKGPXLU}

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	2026-05-18T02:35:00.102115Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

496d676827d5c17ec090d3be3519f75d319e2aab7878987441d872c2cb74fa01

Aliases

arxiv: 0903.4925 · arxiv_version: 0903.4925v2 · doi: 10.48550/arxiv.0903.4925 · pith_short_12: JFWWO2BH2XAX · pith_short_16: JFWWO2BH2XAX5QEQ · pith_short_8: JFWWO2BH

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/JFWWO2BH2XAX5QEQ2O7DKGPXLU \
  | 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: 496d676827d5c17ec090d3be3519f75d319e2aab7878987441d872c2cb74fa01

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15ab38c70dccbfe72cd0c918666fcd012e09c3d3b93d5d0db3fefc1fd72e21e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-27T23:38:31Z",
    "title_canon_sha256": "49b3967020bd0de35e13d65be3f852c3695ca00e34e9dad57cbaafd63c59a307"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4925",
    "kind": "arxiv",
    "version": 2
  }
}