Pith Number

pith:JZ3PDSLP

pith:2021:JZ3PDSLP2L7IGPRZ7Y474TDURC

not attested not anchored not stored refs pending

Forming massive seed black holes in high-redshift quasar host progenitors

Alessandro Lupi, Marta Volonteri, Zoltan Haiman

arxiv:2102.05051 v2 · 2021-02-09 · astro-ph.GA · 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{JZ3PDSLP2L7IGPRZ7Y474TDURC}

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	2026-07-05T03:45:27.055270Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4e76f1c96fd2fe833e39fe39fe4c7488a5e1c1523213addf70f278578b98e46c

Aliases

arxiv: 2102.05051 · arxiv_version: 2102.05051v2 · doi: 10.48550/arxiv.2102.05051 · pith_short_12: JZ3PDSLP2L7I · pith_short_16: JZ3PDSLP2L7IGPRZ · pith_short_8: JZ3PDSLP

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/JZ3PDSLP2L7IGPRZ7Y474TDURC \
  | 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: 4e76f1c96fd2fe833e39fe39fe4c7488a5e1c1523213addf70f278578b98e46c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b9b9be8dab0d27305da7b9454e0ddb61306d82cb0d63cdf3db36d23c1ea39cf",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-02-09T19:00:01Z",
    "title_canon_sha256": "b5bbe92a391517666d29cdc11344ac256a9beb2be894b319aa1ea42247fbcc14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.05051",
    "kind": "arxiv",
    "version": 2
  }
}