Pith Number

pith:BU7KLBXD

pith:2001:BU7KLBXDRJZWSI4QXXP267XYZ4

not attested not anchored not stored refs pending

Massive Black Holes as Population III Remnants

Martin J. Rees (IoA), Piero Madau (UCSC)

arxiv:astro-ph/0101223 v2 · 2001-01-13 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BU7KLBXDRJZWSI4QXXP267XYZ4}

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.

Cited by

5 papers in Pith

Environmental effects vs. modified gravity in the LISA massive black hole binary population

The role of major mergers in triggering super-Eddington accretion

Waveform Modelling for the Laser Interferometer Space Antenna

GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run

Formation and Redshift Evolution of Dark Matter Spikes

Receipt and verification

First computed	2026-07-04T16:22:34.291497Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d3ea586e38a73692390bddfaf7ef8cf098f21ec90ecf2ff09667b18fd1c9eb5

Aliases

arxiv: astro-ph/0101223 · arxiv_version: astro-ph/0101223v2 · doi: 10.48550/arxiv.astro-ph/0101223 · pith_short_12: BU7KLBXDRJZW · pith_short_16: BU7KLBXDRJZWSI4Q · pith_short_8: BU7KLBXD

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/BU7KLBXDRJZWSI4QXXP267XYZ4 \
  | 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: 0d3ea586e38a73692390bddfaf7ef8cf098f21ec90ecf2ff09667b18fd1c9eb5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4eae994b055af64fd8a068b8157981723a8a9ebc4331c231153d4a7520e9aab",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-01-13T22:27:05Z",
    "title_canon_sha256": "919858394ca6a7428571258950fbd78824c88091d39f0d015741053358c4bfdc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0101223",
    "kind": "arxiv",
    "version": 2
  }
}