Pith Number

pith:D7PREYGC

pith:2013:D7PREYGCHS5QYWRENVBVLFXQDN

not attested not anchored not stored refs pending

The evolution of dusty torus covering factor in quasars

Minfeng Gu (SHAO)

arxiv:1307.1193 v2 · 2013-07-04 · 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{D7PREYGCHS5QYWRENVBVLFXQDN}

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	2026-05-18T01:48:59.949237Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fdf1260c23cbb0c5a246d435596f01b4337ff5353af4229989ce198c981da42

Aliases

arxiv: 1307.1193 · arxiv_version: 1307.1193v2 · doi: 10.48550/arxiv.1307.1193 · pith_short_12: D7PREYGCHS5Q · pith_short_16: D7PREYGCHS5QYWRE · pith_short_8: D7PREYGC

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/D7PREYGCHS5QYWRENVBVLFXQDN \
  | 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: 1fdf1260c23cbb0c5a246d435596f01b4337ff5353af4229989ce198c981da42

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff9fa48385a468677a3915dea289662783aad59897d56646b3c38c90bfcd83ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-07-04T03:24:05Z",
    "title_canon_sha256": "2d1bf57ba83f3853c5abb4f39f0bf2cc4f57cf8b5db7b9448b2a51965635fe9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.1193",
    "kind": "arxiv",
    "version": 2
  }
}