Pith Number

pith:O6KXBMX6

pith:2012:O6KXBMX6AD6YW2FJWCUWJ663XM

not attested not anchored not stored refs pending

The cosmic spin of the most massive black holes

Alejo Martinez-Sansigre, Steve Rawlings

arxiv:1201.6591 v1 · 2012-01-31 · astro-ph.HE · 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{O6KXBMX6AD6YW2FJWCUWJ663XM}

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	2026-05-18T04:03:30.081933Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

779570b2fe00fd8b68a9b0a964fbdbbb17f36aaa25a19909b07c7fc780663b1a

Aliases

arxiv: 1201.6591 · arxiv_version: 1201.6591v1 · doi: 10.48550/arxiv.1201.6591 · pith_short_12: O6KXBMX6AD6Y · pith_short_16: O6KXBMX6AD6YW2FJ · pith_short_8: O6KXBMX6

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/O6KXBMX6AD6YW2FJWCUWJ663XM \
  | 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: 779570b2fe00fd8b68a9b0a964fbdbbb17f36aaa25a19909b07c7fc780663b1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "774b46c99cd878edc2f732dae2984d40829979998d11d1af9a84d5a64a159e75",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-01-31T16:19:50Z",
    "title_canon_sha256": "c3204ef04479aef2c7bd784d08db0976c4fbd64569447192c9241f19e5974b3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.6591",
    "kind": "arxiv",
    "version": 1
  }
}