Pith Number

pith:SCV4T7QV

pith:1998:SCV4T7QVZB2GBFSKMBHPFFQDCE

not attested not anchored not stored refs pending

Non-expanding impulsive gravitational waves

J. Podolsky

arxiv:gr-qc/9807081 v1 · 1998-07-29 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SCV4T7QVZB2GBFSKMBHPFFQDCE}

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	2026-07-04T16:08:50.734322Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90abc9fe15c87460964a604ef29603113605c2448f59843cdb3f6da36b1ad3c3

Aliases

arxiv: gr-qc/9807081 · arxiv_version: gr-qc/9807081v1 · doi: 10.48550/arxiv.gr-qc/9807081 · pith_short_12: SCV4T7QVZB2G · pith_short_16: SCV4T7QVZB2GBFSK · pith_short_8: SCV4T7QV

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/SCV4T7QVZB2GBFSKMBHPFFQDCE \
  | 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: 90abc9fe15c87460964a604ef29603113605c2448f59843cdb3f6da36b1ad3c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "835e56f5c6c096f375eb80ec94b5ff954c5461ea99fc8db452d7624006230721",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1998-07-29T14:25:29Z",
    "title_canon_sha256": "31a7b5eb0d145fce5c4ac75d91fa1c0ee4e55a71ba94ced9a67de3cca2d6aa8d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9807081",
    "kind": "arxiv",
    "version": 1
  }
}