Pith Number

pith:KSJBVMFA

pith:2003:KSJBVMFA5OBQRYE2CDVK7HMQYC

not attested not anchored not stored refs pending

Measuring $\alpha$ in the Early Universe: CMB Polarization, Reionization and the Fisher Matrix Analysis

A. Melchiorri (Oxford, Cambridge, CAUP), C.J.A.P. Martins (CAUP, G. Rocha (Cambridge, IAP), P.P. Avelino (Porto), P.T.P. Viana (CAUP), R. Bean (Princeton), Roma), R. Trotta (Geneva)

arxiv:astro-ph/0309211 v1 · 2003-09-08 · 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{KSJBVMFA5OBQRYE2CDVK7HMQYC}

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	2026-07-04T15:26:24.431734Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54921ab0a0eb8308e09a10eaaf9d90c0a2ba984c1c2eeb647deaad5c15393c39

Aliases

arxiv: astro-ph/0309211 · arxiv_version: astro-ph/0309211v1 · doi: 10.48550/arxiv.astro-ph/0309211 · pith_short_12: KSJBVMFA5OBQ · pith_short_16: KSJBVMFA5OBQRYE2 · pith_short_8: KSJBVMFA

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/KSJBVMFA5OBQRYE2CDVK7HMQYC \
  | 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: 54921ab0a0eb8308e09a10eaaf9d90c0a2ba984c1c2eeb647deaad5c15393c39

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c5350af4c11cda8bbec22788f69a3e6e9015622e4e97f56956b6237b758a2b0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-09-08T16:46:31Z",
    "title_canon_sha256": "0ed91c89e3d4e23c0b70547b8b67aa21e50da7583f1bba134cfa8c682d9e9e90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0309211",
    "kind": "arxiv",
    "version": 1
  }
}