Pith Number

pith:FHRLSVUX

pith:2015:FHRLSVUXEYMR6BF4XKGU2HQH7Y

not attested not anchored not stored refs pending

An Apparent Redshift Dependence of Quasar Continuum: Implication for Cosmic Dust Extinction?

Jun Yin, Shiyin Shen, Xiaoyi Xie, Zhengyi Shao

arxiv:1503.02235 v2 · 2015-03-08 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FHRLSVUXEYMR6BF4XKGU2HQH7Y}

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	2026-05-18T01:40:52.976415Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29e2b9569726191f04bcba8d4d1e07fe0212409ecf3c98c4f369abdc975597db

Aliases

arxiv: 1503.02235 · arxiv_version: 1503.02235v2 · doi: 10.48550/arxiv.1503.02235 · pith_short_12: FHRLSVUXEYMR · pith_short_16: FHRLSVUXEYMR6BF4 · pith_short_8: FHRLSVUX

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/FHRLSVUXEYMR6BF4XKGU2HQH7Y \
  | 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: 29e2b9569726191f04bcba8d4d1e07fe0212409ecf3c98c4f369abdc975597db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f0a58558fafb36547246b3bb705acbb8591d058b4ed11b903412ebdf5c46340",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-03-08T01:30:47Z",
    "title_canon_sha256": "a7111dd85982232982309124491297639515b9a2ef1326ebd60d93651625fe2c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02235",
    "kind": "arxiv",
    "version": 2
  }
}