Pith Number

pith:324KIIPD

pith:2019:324KIIPD7GG2QDV7MNR3M5PBKE

not attested not anchored not stored refs pending

Analogue Black Hole Spectroscopy; or, how to listen to dumb holes

Maur\'icio Richartz, Sam Patrick, Silke Weinfurtner, Theo Torres

arxiv:1905.00356 v1 · 2019-05-01 · gr-qc · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{324KIIPD7GG2QDV7MNR3M5PBKE}

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	2026-07-05T00:09:50.493904Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

deb8a421e3f98da80ebf6363b675e1511c7e33fea184cf5f99506749254213be

Aliases

arxiv: 1905.00356 · arxiv_version: 1905.00356v1 · doi: 10.48550/arxiv.1905.00356 · pith_short_12: 324KIIPD7GG2 · pith_short_16: 324KIIPD7GG2QDV7 · pith_short_8: 324KIIPD

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/324KIIPD7GG2QDV7MNR3M5PBKE \
  | 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: deb8a421e3f98da80ebf6363b675e1511c7e33fea184cf5f99506749254213be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1b6b347cadece1a0f4f31f57e84e170baca84aadaf1e6cba78e99368f26963f",
    "cross_cats_sorted": [
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-05-01T16:11:16Z",
    "title_canon_sha256": "993d6add619da9b7a00b4086641468ea9a6d7b42f6b1336649e58d067e28088d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.00356",
    "kind": "arxiv",
    "version": 1
  }
}