Pith Number

pith:QRD74KWH

pith:2018:QRD74KWH33YPSRMIERMOVA5X2J

not attested not anchored not stored refs pending

Black hole interior in Painleve-Gullstrand coordinates

Hristu Culetu

arxiv:1801.07146 v1 · 2018-01-16 · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QRD74KWH33YPSRMIERMOVA5X2J}

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	2026-05-18T00:25:22.116337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8447fe2ac7def0f945882458ea83b7d272dc3948c232b891b3bcc286d80fcf4f

Aliases

arxiv: 1801.07146 · arxiv_version: 1801.07146v1 · doi: 10.48550/arxiv.1801.07146 · pith_short_12: QRD74KWH33YP · pith_short_16: QRD74KWH33YPSRMI · pith_short_8: QRD74KWH

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/QRD74KWH33YPSRMIERMOVA5X2J \
  | 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: 8447fe2ac7def0f945882458ea83b7d272dc3948c232b891b3bcc286d80fcf4f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e833ab9d55929a280e212dad47423c8f76e79485f89f1bb44d29a090b0c62893",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-01-16T21:24:50Z",
    "title_canon_sha256": "67c94d9fb05cd696cfe532f21a929ef0c804252a9539a04e70b36a86ee67a8a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.07146",
    "kind": "arxiv",
    "version": 1
  }
}