Pith Number

pith:2QVD6V5V

pith:2008:2QVD6V5V6XBVKSA4UJWMZY3BZR

not attested not anchored not stored refs pending

Delayed Recombination and Cosmic Parameters

Alessandro Melchiorri, Joseph Silk, Rachel Bean, Silvia Galli

arxiv:0807.1420 v1 · 2008-07-09 · 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{2QVD6V5V6XBVKSA4UJWMZY3BZR}

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	2026-07-04T15:38:24.041010Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d42a3f57b5f5c355481ca26ccce361cc68062353d3ceb512d6f5077dba892fa4

Aliases

arxiv: 0807.1420 · arxiv_version: 0807.1420v1 · doi: 10.48550/arxiv.0807.1420 · pith_short_12: 2QVD6V5V6XBV · pith_short_16: 2QVD6V5V6XBVKSA4 · pith_short_8: 2QVD6V5V

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/2QVD6V5V6XBVKSA4UJWMZY3BZR \
  | 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: d42a3f57b5f5c355481ca26ccce361cc68062353d3ceb512d6f5077dba892fa4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8016f1715e3263d3c47b68097f535a0f6202f720d510484df0e8a70bc67a2d5d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-07-09T11:26:26Z",
    "title_canon_sha256": "f23f4bef215067a767ed8efb3663245d865aa79b8bb7604c0ddd60248b9293ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.1420",
    "kind": "arxiv",
    "version": 1
  }
}