Pith Number

pith:7IKZK5VC

pith:2009:7IKZK5VCHNR2ZZMMYZXBOHXSZK

not attested not anchored not stored refs pending

Deviation from the Cosmological Constant or Systematic Errors?

Fa-Yin Wang, Shi Qi, Tan Lu

arxiv:0904.2832 v2 · 2009-04-18 · astro-ph.CO · 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{7IKZK5VCHNR2ZZMMYZXBOHXSZK}

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	2026-07-04T15:49:12.216745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa159576a23b63ace58cc66e171ef2ca9116b43c75cf8e07cf5557355661fc8d

Aliases

arxiv: 0904.2832 · arxiv_version: 0904.2832v2 · doi: 10.48550/arxiv.0904.2832 · pith_short_12: 7IKZK5VCHNR2 · pith_short_16: 7IKZK5VCHNR2ZZMM · pith_short_8: 7IKZK5VC

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/7IKZK5VCHNR2ZZMMYZXBOHXSZK \
  | 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: fa159576a23b63ace58cc66e171ef2ca9116b43c75cf8e07cf5557355661fc8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "224b9fa05972aba39d2a1edb1a142d091758d56308f06a4a971456619eb67f96",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-18T09:00:00Z",
    "title_canon_sha256": "a7afa11cb3f031d24f01ac9f4214d3b1700033cebff873a7834524cb270bbb14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2832",
    "kind": "arxiv",
    "version": 2
  }
}