Pith Number

pith:F44NURKC

pith:2015:F44NURKCTEQAJ2V7CBAT4AU5QA

not attested not anchored not stored refs pending

The Age-Redshift Relationship of Old Passive Galaxies

Fa-Yin Wang, Fulvio Melia, Hai Yu, Jun-Jie Wei, Xue-Feng Wu

arxiv:1505.07671 v1 · 2015-05-28 · 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{F44NURKCTEQAJ2V7CBAT4AU5QA}

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	2026-05-18T01:36:53.255607Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f38da4542992004eabf10413e029d802d9afc9785104db137658acc9076baa2

Aliases

arxiv: 1505.07671 · arxiv_version: 1505.07671v1 · doi: 10.48550/arxiv.1505.07671 · pith_short_12: F44NURKCTEQA · pith_short_16: F44NURKCTEQAJ2V7 · pith_short_8: F44NURKC

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/F44NURKCTEQAJ2V7CBAT4AU5QA \
  | 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: 2f38da4542992004eabf10413e029d802d9afc9785104db137658acc9076baa2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0978e8bbfa3a3f9d89b04d2eebaaf4bdefc5b1bc0f8295610677aa8a3bfd0449",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-05-28T12:35:47Z",
    "title_canon_sha256": "a6c665b8216ea69839fcb27407959e325292cd230309ff0350c732d4496c4899"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.07671",
    "kind": "arxiv",
    "version": 1
  }
}