Pith Number

pith:QJ4Q6Q5J

pith:2021:QJ4Q6Q5J55KTG5SCVJIDBVZLCA

not attested not anchored not stored refs pending

Dynamical Friction Modeling of Massive Black Holes in Cosmological Simulations and Effects on Merger Rate Predictions

Colin DeGraf, Michael Tremmel, Nianyi Chen, Simeon Bird, Tiziana Di Matteo, Yueying Ni, Yu Feng

arxiv:2104.00021 v2 · 2021-03-31 · 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{QJ4Q6Q5J55KTG5SCVJIDBVZLCA}

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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.

Cited by

1 paper in Pith

Tracing black hole and galaxy growth across environments since cosmic noon

Receipt and verification

First computed	2026-07-05T03:38:17.112737Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82790f43a9ef55337642aa5030d72b102e371080feede327c43ccfd5dbc9b065

Aliases

arxiv: 2104.00021 · arxiv_version: 2104.00021v2 · doi: 10.48550/arxiv.2104.00021 · pith_short_12: QJ4Q6Q5J55KT · pith_short_16: QJ4Q6Q5J55KTG5SC · pith_short_8: QJ4Q6Q5J

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/QJ4Q6Q5J55KTG5SCVJIDBVZLCA \
  | 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: 82790f43a9ef55337642aa5030d72b102e371080feede327c43ccfd5dbc9b065

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45e764ae89e294fab38e23b99039b8dc45bdbd9657b20187ece23587cf83415c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-03-31T18:00:04Z",
    "title_canon_sha256": "f2ee5526641000fdfbf29caaa31f23c57d6ac0d2f3e6017bf2c348a8763c53dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.00021",
    "kind": "arxiv",
    "version": 2
  }
}