Pith Number

pith:QP4EWOSA

pith:2021:QP4EWOSAZDSZE5I3P7VUKDOSXG

not attested not anchored not stored refs pending

LSST AGN SC Cadence Note: Two metrics on AGN variability observable

Andjelka Kovacevic, Dragana Ilic, Ilsang Yoon, Isidora Jankov, Iva Cvorovic-Hajdinjak, Luka C. Popovic, Neven Caplar, Viktor Radovic

arxiv:2105.12420 v1 · 2021-05-26 · 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{QP4EWOSAZDSZE5I3P7VUKDOSXG}

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	2026-07-05T02:43:38.652894Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83f84b3a40c8e592751b7feb450dd2b99f5c0b732d09ab405ddd86911eb9463c

Aliases

arxiv: 2105.12420 · arxiv_version: 2105.12420v1 · doi: 10.48550/arxiv.2105.12420 · pith_short_12: QP4EWOSAZDSZ · pith_short_16: QP4EWOSAZDSZE5I3 · pith_short_8: QP4EWOSA

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/QP4EWOSAZDSZE5I3P7VUKDOSXG \
  | 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: 83f84b3a40c8e592751b7feb450dd2b99f5c0b732d09ab405ddd86911eb9463c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "632f9347ca3b0ae4b15a32e16a77a3fffcf0334daeaae352d0a9d9e0a541be30",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-05-26T09:23:23Z",
    "title_canon_sha256": "e530a14af794ed897a14edd897d38d7c4254ec243dabdd06aad200f35a11cb6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.12420",
    "kind": "arxiv",
    "version": 1
  }
}