Pith Number

pith:VIS6YBML

pith:2019:VIS6YBMLXD67KBVFRVVWFEQGYZ

not attested not anchored not stored refs pending

Formation of massive black holes in rapidly growing pre-galactic gas clouds

Brian W. O'Shea, Hao Xu, John A. Regan, John H. Wise, Michael L. Norman, Turlough P. Downes

arxiv:1901.07563 v1 · 2019-01-22 · astro-ph.GA

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

1 paper in Pith

Direct Collapse Black Hole Candidates from Decaying Dark Matter

Receipt and verification

First computed	2026-05-17T23:53:08.802187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa25ec058bb8fdf506a58d6b629206c65ce9f71a61ad30ccbac5ec390f7e9767

Aliases

arxiv: 1901.07563 · arxiv_version: 1901.07563v1 · doi: 10.48550/arxiv.1901.07563 · pith_short_12: VIS6YBMLXD67 · pith_short_16: VIS6YBMLXD67KBVF · pith_short_8: VIS6YBML

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/VIS6YBMLXD67KBVFRVVWFEQGYZ \
  | 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: aa25ec058bb8fdf506a58d6b629206c65ce9f71a61ad30ccbac5ec390f7e9767

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b4dedbcb558422b84a0defff53369224157922556a96be4de74ac9d9a30c182d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-22T19:00:00Z",
    "title_canon_sha256": "74caa69164d3b7bcd9a39b32f5b8ba96db86f4440461eb96d40273e0f06deaab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.07563",
    "kind": "arxiv",
    "version": 1
  }
}