Pith Number

pith:WEC7CPXL

pith:2002:WEC7CPXLT5Y6Q2AKKAUWF4DQTO

not attested not anchored not stored refs pending

Age Constraints on Brane Models of Dark Energy

Abha Dev (University of Delhi), Deepak Jain (University of Delhi), J. S. Alcaniz (University of Washington)

arxiv:astro-ph/0206448 v2 · 2002-06-26 · astro-ph · gr-qc · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WEC7CPXLT5Y6Q2AKKAUWF4DQTO}

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	2026-05-18T04:21:23.100853Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b105f13eeb9f71e8680a502962f0709b814c6d354d5456085963e937b53b5427

Aliases

arxiv: astro-ph/0206448 · arxiv_version: astro-ph/0206448v2 · doi: 10.48550/arxiv.astro-ph/0206448 · pith_short_12: WEC7CPXLT5Y6 · pith_short_16: WEC7CPXLT5Y6Q2AK · pith_short_8: WEC7CPXL

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/WEC7CPXLT5Y6Q2AKKAUWF4DQTO \
  | 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: b105f13eeb9f71e8680a502962f0709b814c6d354d5456085963e937b53b5427

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd8d8918bb71972b108cf6a868b690b8591aa1eb9c1a21a029597e8b97d2a37f",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-06-26T02:22:23Z",
    "title_canon_sha256": "a959923edf0c6e0d28d723ae8362938ddfecd0f315a3975137b2c6cd515e76d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0206448",
    "kind": "arxiv",
    "version": 2
  }
}