Pith Number

pith:IQLXVCD5

pith:2014:IQLXVCD5UQBALJHOTLT5P7NKXW

not attested not anchored not stored refs pending

Fluctuation of the Hubble parameter

Hao-Feng Qin, Tong-Jie Zhang, Xi-Bin Li, Zhi-Song Zhang

arxiv:1404.2168 v2 · 2014-04-08 · 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{IQLXVCD5UQBALJHOTLT5P7NKXW}

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	2026-05-18T01:43:36.442354Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44177a887da40205a4ee9ae7d7fdaabd8f78c144903137d77800d19e3d532838

Aliases

arxiv: 1404.2168 · arxiv_version: 1404.2168v2 · doi: 10.48550/arxiv.1404.2168 · pith_short_12: IQLXVCD5UQBA · pith_short_16: IQLXVCD5UQBALJHO · pith_short_8: IQLXVCD5

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/IQLXVCD5UQBALJHOTLT5P7NKXW \
  | 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: 44177a887da40205a4ee9ae7d7fdaabd8f78c144903137d77800d19e3d532838

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "03a2d036f650e2363bf2d13c8c923c93f6d3c95da4669d6026262778df38e7a2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-04-08T14:57:07Z",
    "title_canon_sha256": "27056ee319e86a73cd2e1d0efd59d069417971b463bae44b7b60c750134af440"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.2168",
    "kind": "arxiv",
    "version": 2
  }
}