Pith Number

pith:FYXU7LZD

pith:2012:FYXU7LZDV7BLNT3HFWKCLROOOV

not attested not anchored not stored refs pending

Unusual quasars from the Sloan Digital Sky Survey selected by means of Kohonen self-organising maps

A. de Hoon, A. in der Au, B. Kaminsky, H. Meusinger, M. Newholm, P. Schalldach, R.-D. Scholz

arxiv:1203.0215 v2 · 2012-03-01 · 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{FYXU7LZDV7BLNT3HFWKCLROOOV}

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	2026-05-18T01:58:17.801539Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e2f4faf23afc2b6cf672d9425c5ce757b85dc1b622154f1ef539eb5fbc21806

Aliases

arxiv: 1203.0215 · arxiv_version: 1203.0215v2 · doi: 10.48550/arxiv.1203.0215 · pith_short_12: FYXU7LZDV7BL · pith_short_16: FYXU7LZDV7BLNT3H · pith_short_8: FYXU7LZD

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/FYXU7LZDV7BLNT3HFWKCLROOOV \
  | 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: 2e2f4faf23afc2b6cf672d9425c5ce757b85dc1b622154f1ef539eb5fbc21806

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eea1e0bfd007ac486a3a6de94d8ca42dedae4a37e2f5cbe634882a858155c78e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-03-01T15:33:44Z",
    "title_canon_sha256": "48e01bedf55e1f539840586e211daa4dd6114830c0066814dd07bf3c161bdbbd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.0215",
    "kind": "arxiv",
    "version": 2
  }
}