Pith Number

pith:CF7EDCYW

pith:2020:CF7EDCYWQIFXSK2XALQYR52YJD

not attested not anchored not stored refs pending

Changing-look active galactic nuclei: close binaries of supermassive black holes in action

Edi Bon, Jian-Min Wang

arxiv:2010.04417 v2 · 2020-10-09 · 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{CF7EDCYWQIFXSK2XALQYR52YJD}

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	2026-07-05T01:52:29.126438Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

117e418b16820b792b5702e188f75848d4c01e2a35c322b74b22e7c271efc428

Aliases

arxiv: 2010.04417 · arxiv_version: 2010.04417v2 · doi: 10.48550/arxiv.2010.04417 · pith_short_12: CF7EDCYWQIFX · pith_short_16: CF7EDCYWQIFXSK2X · pith_short_8: CF7EDCYW

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/CF7EDCYWQIFXSK2XALQYR52YJD \
  | 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: 117e418b16820b792b5702e188f75848d4c01e2a35c322b74b22e7c271efc428

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e602967ee1f4c896cf4fae5f7e77516c847164320466efa641cc2cf5a30c6b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-10-09T08:01:59Z",
    "title_canon_sha256": "c3e6029649abd3f33bd0908559dc7019140a308032c5cdc803973283ca39d672"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.04417",
    "kind": "arxiv",
    "version": 2
  }
}