Pith Number

pith:DH3BUUSN

pith:2011:DH3BUUSNF5NZJD6EXFBB3OK6JQ

not attested not anchored not stored refs pending

Black Holes: Attractors for Intelligence?

Clement Vidal

arxiv:1104.4362 v1 · 2011-04-21 · physics.gen-ph

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

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

2 papers in Pith

Redshifted civilizations, galactic empires, and the Fermi paradox

The Dyson Minds 2025 Workshop: SETI around Black Holes

Receipt and verification

First computed	2026-05-18T04:23:34.793493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19f61a524d2f5b948fc4b9421db95e4c259d52ea7b79bcecca27011f0a28afae

Aliases

arxiv: 1104.4362 · arxiv_version: 1104.4362v1 · doi: 10.48550/arxiv.1104.4362 · pith_short_12: DH3BUUSNF5NZ · pith_short_16: DH3BUUSNF5NZJD6E · pith_short_8: DH3BUUSN

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/DH3BUUSNF5NZJD6EXFBB3OK6JQ \
  | 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: 19f61a524d2f5b948fc4b9421db95e4c259d52ea7b79bcecca27011f0a28afae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc21844adb94d9232f577b268e5fad5cc33a03c9ecfbde6065347daf1cf24f0b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2011-04-21T22:29:17Z",
    "title_canon_sha256": "61ed102b637ca0fc66bae8d769d9920abf6fc599d49702b9b9fa97c57ff40456"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.4362",
    "kind": "arxiv",
    "version": 1
  }
}