Pith Number

pith:XIYPEM6V

pith:2004:XIYPEM6VY6Y2LZUUTYYUET5P6A

not attested not anchored not stored refs pending

Acoustic analogs of two-dimensional black holes

Mariano Cadoni

arxiv:gr-qc/0410138 v2 · 2004-10-28 · 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{XIYPEM6VY6Y2LZUUTYYUET5P6A}

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	2026-05-18T01:06:47.184407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba30f233d5c7b1a5e6949e31424faff007f9d1727afa0d779bd60eae1065dd33

Aliases

arxiv: gr-qc/0410138 · arxiv_version: gr-qc/0410138v2 · doi: 10.48550/arxiv.gr-qc/0410138 · pith_short_12: XIYPEM6VY6Y2 · pith_short_16: XIYPEM6VY6Y2LZUU · pith_short_8: XIYPEM6V

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/XIYPEM6VY6Y2LZUUTYYUET5P6A \
  | 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: ba30f233d5c7b1a5e6949e31424faff007f9d1727afa0d779bd60eae1065dd33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f3f0ed5260bd1269c66956e12c96ff61e2aa03531ca63daeeeb1b62e2a790cb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2004-10-28T10:04:36Z",
    "title_canon_sha256": "a61d960e50078f6da52579d672dd8c7e4c0166c88eeeabb841360de97a92cb23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0410138",
    "kind": "arxiv",
    "version": 2
  }
}