Pith Number

pith:Q6PF65WH

pith:2009:Q6PF65WHVXUQQNDW2D2E6LYD2W

not attested not anchored not stored refs pending

Mass and spin coevolution during the alignment of a black hole in a warped accretion disc

A. Perego, M. Colpi, M. Dotti, M. Volonteri

arxiv:0907.3742 v1 · 2009-07-21 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q6PF65WHVXUQQNDW2D2E6LYD2W}

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	2026-05-18T02:12:54.893758Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

879e5f76c7ade9083476d0f44f2f03d5966347abf8701b52f01f83c2fb1f1827

Aliases

arxiv: 0907.3742 · arxiv_version: 0907.3742v1 · doi: 10.48550/arxiv.0907.3742 · pith_short_12: Q6PF65WHVXUQ · pith_short_16: Q6PF65WHVXUQQNDW · pith_short_8: Q6PF65WH

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/Q6PF65WHVXUQQNDW2D2E6LYD2W \
  | 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: 879e5f76c7ade9083476d0f44f2f03d5966347abf8701b52f01f83c2fb1f1827

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8255d2c3b232f4e264144ab3462d3fa530b1bcedf80670260ac04277e7770445",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-21T20:46:37Z",
    "title_canon_sha256": "6bd58e14c9007d4d11ca100039c2a90efdc666cb83bac83c27ccf0f3be41ff1a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3742",
    "kind": "arxiv",
    "version": 1
  }
}