Pith Number

pith:NZJYL4VK

pith:2018:NZJYL4VKC2LTS4GTMDN2A756PY

not attested not anchored not stored refs pending

The Petrov type D isolated null surfaces

Denis Dobkowski-Ry{\l}ko, Jerzy lewandowski, Tomasz Paw{\l}owski

arxiv:1803.03203 v2 · 2018-03-08 · 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{NZJYL4VKC2LTS4GTMDN2A756PY}

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	2026-05-18T00:08:43.077761Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e5385f2aa16973970d360dba07fbe7e14b1f6fef4f84290202d5518b8259876

Aliases

arxiv: 1803.03203 · arxiv_version: 1803.03203v2 · doi: 10.48550/arxiv.1803.03203 · pith_short_12: NZJYL4VKC2LT · pith_short_16: NZJYL4VKC2LTS4GT · pith_short_8: NZJYL4VK

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/NZJYL4VKC2LTS4GTMDN2A756PY \
  | 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: 6e5385f2aa16973970d360dba07fbe7e14b1f6fef4f84290202d5518b8259876

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9c18ecdbb3c6031498ee8f6d9f96a25fc6c475d7ce4a465ddf062f9c802ba0bd",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-03-08T17:08:19Z",
    "title_canon_sha256": "6ad0832f1a71ea34e4860fecab32f3568c10607b4eaca0fec46fa95c692b8432"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.03203",
    "kind": "arxiv",
    "version": 2
  }
}