Pith Number

pith:4HZXKOMP

pith:2006:4HZXKOMPB2LKKJIEO6BC5IT2GD

not attested not anchored not stored refs pending

CMB constraints on the fine structure constant

Kazuhide Ichikawa, Masahiro Kawasaki, Toru Kanzaki

arxiv:astro-ph/0602577 v2 · 2006-02-27 · 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{4HZXKOMPB2LKKJIEO6BC5IT2GD}

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	2026-07-04T15:19:40.020270Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1f375398f0e96a5250477822ea27a30c1c76b526e162f3509d520cf8cf344b5

Aliases

arxiv: astro-ph/0602577 · arxiv_version: astro-ph/0602577v2 · doi: 10.48550/arxiv.astro-ph/0602577 · pith_short_12: 4HZXKOMPB2LK · pith_short_16: 4HZXKOMPB2LKKJIE · pith_short_8: 4HZXKOMP

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/4HZXKOMPB2LKKJIEO6BC5IT2GD \
  | 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: e1f375398f0e96a5250477822ea27a30c1c76b526e162f3509d520cf8cf344b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9db2c2848981e141934d2e272d4ab49ec24c90410b31bc6b7839edc7c693cb52",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-02-27T09:43:37Z",
    "title_canon_sha256": "98305948624805a1937c69e8f906890ce7c5b198cd29788671b6c2f5e5488e1d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0602577",
    "kind": "arxiv",
    "version": 2
  }
}