Pith Number

pith:OO2V2EIZ

pith:2011:OO2V2EIZ4DVUEFXEJTWEBHGBRM

not attested not anchored not stored refs pending

Time and irreversibility in an accelerating universe

Daniela P\'erez, Gustavo E. Romero

arxiv:1105.3626 v2 · 2011-05-18 · physics.gen-ph · 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{OO2V2EIZ4DVUEFXEJTWEBHGBRM}

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	2026-05-18T02:01:56.546475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73b55d1119e0eb4216e44cec409cc18b222c3df11e36a949281d4f093c2be33f

Aliases

arxiv: 1105.3626 · arxiv_version: 1105.3626v2 · doi: 10.48550/arxiv.1105.3626 · pith_short_12: OO2V2EIZ4DVU · pith_short_16: OO2V2EIZ4DVUEFXE · pith_short_8: OO2V2EIZ

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/OO2V2EIZ4DVUEFXEJTWEBHGBRM \
  | 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: 73b55d1119e0eb4216e44cec409cc18b222c3df11e36a949281d4f093c2be33f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6aadd46f30cb129bd25fc9dbb288563452e75757c85972e77919d349c3bf2a3c",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2011-05-18T13:39:10Z",
    "title_canon_sha256": "5b274236f24c7f881d24aefac9379eff9be76dfdaa0d38db07c733b1f5a323f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.3626",
    "kind": "arxiv",
    "version": 2
  }
}