Pith Number

pith:BDKRIL73

pith:2003:BDKRIL73WEIJ433QA6KTXODU7C

not attested not anchored not stored refs pending

Constraining the variation of fundamental constants using 18cm OH lines

(2) Kapteyn Institute, India, Jayaram N. Chengalur (1), Nissim Kanekar (2) ((1) National Centre for Radio Astrophysics, the Netherlands)

arxiv:astro-ph/0310764 v1 · 2003-10-27 · astro-ph · hep-th · physics.atom-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{BDKRIL73WEIJ433QA6KTXODU7C}

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.

Cited by

1 paper in Pith

Tracing Cold Gas in Absorption Across Cosmic Time with the SKA

Receipt and verification

First computed	2026-07-04T15:20:12.818819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08d5142ffbb1109e6f7007953bb874f8a83c8734551a319ddfb8033d05838fd7

Aliases

arxiv: astro-ph/0310764 · arxiv_version: astro-ph/0310764v1 · doi: 10.48550/arxiv.astro-ph/0310764 · pith_short_12: BDKRIL73WEIJ · pith_short_16: BDKRIL73WEIJ433Q · pith_short_8: BDKRIL73

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/BDKRIL73WEIJ433QA6KTXODU7C \
  | 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: 08d5142ffbb1109e6f7007953bb874f8a83c8734551a319ddfb8033d05838fd7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63b6cd0423a79cc3f01aa57dd57be408031a779b311d60d0ced489220a882157",
    "cross_cats_sorted": [
      "hep-th",
      "physics.atom-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-10-27T20:16:29Z",
    "title_canon_sha256": "69157407e3905ba6501e5e73e255511b2c14a62db0da51b4619b13b9096c914e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0310764",
    "kind": "arxiv",
    "version": 1
  }
}