Pith Number

pith:ZNZW4EIL

pith:2018:ZNZW4EIL4MEQRPAHASHEBPVWDA

not attested not anchored not stored refs pending

Black hole formation from the gravitational collapse of a non-spherical network of structures

Ismael Delgado Gaspar, Israel Quiros, Juan Carlos Hidalgo, Roberto A. Sussman

arxiv:1802.09123 v2 · 2018-02-26 · gr-qc · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZNZW4EIL4MEQRPAHASHEBPVWDA}

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	2026-05-18T00:15:36.564216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb736e110be30908bc07048e40beb6180758eabe2c04d90b4d935670c05d1084

Aliases

arxiv: 1802.09123 · arxiv_version: 1802.09123v2 · doi: 10.48550/arxiv.1802.09123 · pith_short_12: ZNZW4EIL4MEQ · pith_short_16: ZNZW4EIL4MEQRPAH · pith_short_8: ZNZW4EIL

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/ZNZW4EIL4MEQRPAHASHEBPVWDA \
  | 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: cb736e110be30908bc07048e40beb6180758eabe2c04d90b4d935670c05d1084

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b9a606976e2399be5ce2c318a9c9b3502db9299c27fe02d928bde4de5062485",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-02-26T01:37:17Z",
    "title_canon_sha256": "576679eafd30e2b63059c049041cf73e29ca251dcb5a20c3a65121d929740132"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.09123",
    "kind": "arxiv",
    "version": 2
  }
}