Pith Number

pith:YAC4V3VV

pith:2020:YAC4V3VVY6TJD26DTDDH62PEKO

not attested not anchored not stored refs pending

Optical spectral properties of radio loud quasars along the main sequence

A. C. Negrete, A. Del Olmo, E. Bon, M. D'Onofrio, N. Bon, P. Marziani, V. Ganci

arxiv:2004.12748 v1 · 2020-04-27 · 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{YAC4V3VVY6TJD26DTDDH62PEKO}

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	2026-07-05T02:57:07.294568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c005caeeb5c7a691ebc398c67f69e453a47b7e9141eb4702f22f8236f0c03e02

Aliases

arxiv: 2004.12748 · arxiv_version: 2004.12748v1 · doi: 10.48550/arxiv.2004.12748 · pith_short_12: YAC4V3VVY6TJ · pith_short_16: YAC4V3VVY6TJD26D · pith_short_8: YAC4V3VV

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/YAC4V3VVY6TJD26DTDDH62PEKO \
  | 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: c005caeeb5c7a691ebc398c67f69e453a47b7e9141eb4702f22f8236f0c03e02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "192e50ba44a30b8295a8cf4d8ec0b282b5da953e0a08a401d2fb5fb689c9adb7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-04-27T12:49:31Z",
    "title_canon_sha256": "1cb948b0a1e2a3dc41149ca2b703065d25cb20eadb55c69255d92027bb7169e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.12748",
    "kind": "arxiv",
    "version": 1
  }
}