Pith Number

pith:PJ7U7G46

pith:2015:PJ7U7G46XL3EJW7LZKLR2RC6SJ

not attested not anchored not stored refs pending

Variability of QSOs with variable regions in broad absorption troughs from the Sloan Digital Sky Survey

Institute of Theoretical Physics, Nanjing Normal University), Wei-Hao Bian, Xiao-Lei Jiang, Xue Ge (Department of Physics, Zhi-Cheng He

arxiv:1509.03691 v1 · 2015-09-12 · 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{PJ7U7G46XL3EJW7LZKLR2RC6SJ}

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	2026-05-18T01:28:03.050344Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a7f4f9b9ebaf644dbebca971d445e9255b8e3b342821073437e409acc238ac3

Aliases

arxiv: 1509.03691 · arxiv_version: 1509.03691v1 · doi: 10.48550/arxiv.1509.03691 · pith_short_12: PJ7U7G46XL3E · pith_short_16: PJ7U7G46XL3EJW7L · pith_short_8: PJ7U7G46

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/PJ7U7G46XL3EJW7LZKLR2RC6SJ \
  | 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: 7a7f4f9b9ebaf644dbebca971d445e9255b8e3b342821073437e409acc238ac3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf74b04bb7a616ecda5e6eea8467bc3820a9cd99541a5d156277bdeb2a4b2eeb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-09-12T01:34:18Z",
    "title_canon_sha256": "290651cb249089ac01b30f26e91343bd58ea16034e6c29e32b48d3caf30ac6c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.03691",
    "kind": "arxiv",
    "version": 1
  }
}