Pith Number

pith:2V5U3LK3

pith:2012:2V5U3LK3P56SD32NM5RTCSY3D6

not attested not anchored not stored refs pending

Hubble parameter measurement constraints on dark energy

Bharat Ratra, Data Mania, Omer Farooq

arxiv:1211.4253 v2 · 2012-11-18 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2V5U3LK3P56SD32NM5RTCSY3D6}

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	2026-05-18T01:53:03.196954Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d57b4dad5b7f7d21ef4d6763314b1b1f9a749488d91527fce683482bea22c341

Aliases

arxiv: 1211.4253 · arxiv_version: 1211.4253v2 · doi: 10.48550/arxiv.1211.4253 · pith_short_12: 2V5U3LK3P56S · pith_short_16: 2V5U3LK3P56SD32N · pith_short_8: 2V5U3LK3

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/2V5U3LK3P56SD32NM5RTCSY3D6 \
  | 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: d57b4dad5b7f7d21ef4d6763314b1b1f9a749488d91527fce683482bea22c341

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a65f368129fb9626b687caf8391d13a04021837568576203588a0d3dbd697871",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-11-18T20:00:47Z",
    "title_canon_sha256": "40f1e0a258cf3c8d11c0da69ad90d6d91fcb98062b6d5ab8f303ee35b09530c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.4253",
    "kind": "arxiv",
    "version": 2
  }
}