Pith Number

pith:DU7IKDJ7

pith:2010:DU7IKDJ7FG3KE3K5CHZPMKD6MN

not attested not anchored not stored refs pending

Trapping Horizons in the Sultana-Dyer Space-Time

Cheng-Yi Sun

arxiv:1004.1760 v3 · 2010-04-11 · 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{DU7IKDJ7FG3KE3K5CHZPMKD6MN}

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	2026-05-18T04:23:03.111654Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d3e850d3f29b6a26d5d11f2f6287e634b6d0137068ea25ca07eb109f0c0116d

Aliases

arxiv: 1004.1760 · arxiv_version: 1004.1760v3 · doi: 10.48550/arxiv.1004.1760 · pith_short_12: DU7IKDJ7FG3K · pith_short_16: DU7IKDJ7FG3KE3K5 · pith_short_8: DU7IKDJ7

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/DU7IKDJ7FG3KE3K5CHZPMKD6MN \
  | 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: 1d3e850d3f29b6a26d5d11f2f6287e634b6d0137068ea25ca07eb109f0c0116d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77a6c6b7ffed4b6a36e8baccd2e536dd39a6a5feb9c97743e35e56317b4944f5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2010-04-11T04:35:23Z",
    "title_canon_sha256": "2d7639a9ef0e8d0e8672f20bd303bcfe7241e8fe0693f6c9de217e084a7f78fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.1760",
    "kind": "arxiv",
    "version": 3
  }
}