Pith Number

pith:4ZS5QAAA

pith:2026:4ZS5QAAA5ZPO6P3WTSWUZMD4XY

not attested not anchored not stored refs pending

A new model of quasar mass evolution

(2) NJU), M. Zhang (1), Q.-H. Peng (2), X. Liu (1) ((1) XAO-CAS, Z. Li (1)

arxiv:2607.04705 v1 · 2026-07-06 · 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{4ZS5QAAA5ZPO6P3WTSWUZMD4XY}

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	2026-07-07T02:19:58.946396Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e665d80000ee5eef3f769cad4cb07cbe2b94474b29afebef2fa5074c297de119

Aliases

arxiv: 2607.04705 · arxiv_version: 2607.04705v1 · doi: 10.48550/arxiv.2607.04705 · pith_short_12: 4ZS5QAAA5ZPO · pith_short_16: 4ZS5QAAA5ZPO6P3W · pith_short_8: 4ZS5QAAA

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/4ZS5QAAA5ZPO6P3WTSWUZMD4XY \
  | 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: e665d80000ee5eef3f769cad4cb07cbe2b94474b29afebef2fa5074c297de119

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77ab8ce1613c02ed72d5c82b1af75d018017ec8c68163b45579a98166c44924a",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-07-06T06:14:52Z",
    "title_canon_sha256": "f5dbb48c1c1262d47f105cd0d27c5381d52ce02f53ef367a18582df33ff485c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.04705",
    "kind": "arxiv",
    "version": 1
  }
}