Pith Number

pith:5O25IUBP

pith:2009:5O25IUBPHP5B2INNQK5FBCLN5C

not attested not anchored not stored refs pending

Accelerated cosmic expansion in a scalar-field universe

Ken-ichi Nakao, Pankaj S. Joshi, Swastik Bhattacharya

arxiv:0911.2297 v1 · 2009-11-12 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5O25IUBPHP5B2INNQK5FBCLN5C}

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	2026-05-18T04:23:57.011300Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ebb5d4502f3bfa1d21ad82ba50896de887c6392c684a2fe1153ead88bbf61df1

Aliases

arxiv: 0911.2297 · arxiv_version: 0911.2297v1 · doi: 10.48550/arxiv.0911.2297 · pith_short_12: 5O25IUBPHP5B · pith_short_16: 5O25IUBPHP5B2INN · pith_short_8: 5O25IUBP

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/5O25IUBPHP5B2INNQK5FBCLN5C \
  | 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: ebb5d4502f3bfa1d21ad82ba50896de887c6392c684a2fe1153ead88bbf61df1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2645708333a7b5ee539da05ff27986e4285daf8755707901566444dff5645ed1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-11-12T04:32:45Z",
    "title_canon_sha256": "c8ae9d67b8eb7730a796330776d2cbd5d1399f82e70f0b3f6a7ff422aa6a5851"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2297",
    "kind": "arxiv",
    "version": 1
  }
}