Pith Number

pith:HA5BBTPF

pith:2018:HA5BBTPFONOSL2SJD6PTP4AHFR

not attested not anchored not stored refs pending

Observational evidence for the formation of trapping horizons in astrophysical black holes

Pawan Kumar, Ra\'ul Carballo-Rubio, Wenbin Lu

arxiv:1804.00663 v1 · 2018-04-02 · gr-qc · 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{HA5BBTPFONOSL2SJD6PTP4AHFR}

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	2026-05-18T00:12:17.706853Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

383a10cde5735d25ea491f9f37f0072c6ac8e88db1bf6ea5bc131ba32dc42d2e

Aliases

arxiv: 1804.00663 · arxiv_version: 1804.00663v1 · doi: 10.48550/arxiv.1804.00663 · pith_short_12: HA5BBTPFONOS · pith_short_16: HA5BBTPFONOSL2SJ · pith_short_8: HA5BBTPF

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/HA5BBTPFONOSL2SJD6PTP4AHFR \
  | 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: 383a10cde5735d25ea491f9f37f0072c6ac8e88db1bf6ea5bc131ba32dc42d2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b198020fb4e1bcbf89c2c972268b5f1c329691bf730e52ec3956f6b1b42b82c",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-04-02T18:00:01Z",
    "title_canon_sha256": "b2beb6435a302dbf199aa925934819cebf9bb859169765962ae0370f0d9b122f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.00663",
    "kind": "arxiv",
    "version": 1
  }
}