Pith Number

pith:JUONRPGX

pith:2008:JUONRPGXKATZXDG4HTHNID22BY

not attested not anchored not stored refs pending

Early Universe Constraints on Time Variation of Fundamental Constants

Claudia G. Scoccola, Hector Vucetich, Mercedes E. Mosquera, Susana J. Landau

arxiv:0809.2033 v1 · 2008-09-11 · 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{JUONRPGXKATZXDG4HTHNID22BY}

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

Towards degeneracy breaking of early universe models

Receipt and verification

First computed	2026-07-04T15:29:14.711603Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d1cd8bcd750279b8cdc3cced40f5a0e32c68ebffcd3d158f182b294038c83fa

Aliases

arxiv: 0809.2033 · arxiv_version: 0809.2033v1 · doi: 10.48550/arxiv.0809.2033 · pith_short_12: JUONRPGXKATZ · pith_short_16: JUONRPGXKATZXDG4 · pith_short_8: JUONRPGX

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/JUONRPGXKATZXDG4HTHNID22BY \
  | 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: 4d1cd8bcd750279b8cdc3cced40f5a0e32c68ebffcd3d158f182b294038c83fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9475db5b18ee43dac1a5ad2a9180efd792a7402067fc52e46e9718751499185e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-11T15:48:23Z",
    "title_canon_sha256": "fefbdce2381cb4887d8fdc14f1da08cc062ad6e63eef3a54c8c5b32d0d49b62f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.2033",
    "kind": "arxiv",
    "version": 1
  }
}