Pith Number

pith:Z6U2ZFKC

pith:1997:Z6U2ZFKC3BYOEX6X6KQMSRWORJ

not attested not anchored not stored refs pending

Acoustic black holes: horizons, ergospheres, and Hawking radiation

Matt Visser (Washington University)

arxiv:gr-qc/9712010 v2 · 1997-12-01 · 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{Z6U2ZFKC3BYOEX6X6KQMSRWORJ}

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.

Cited by

4 papers in Pith

Shadow, acoustic redshift, and transfer observables of Lorentz-violating rotating acoustic black holes

Superradiance -- the 2020 Edition

Bosonic and Fermionic love number of static acoustic black hole

Total transmission modes in draining bathtub model with vorticity

Receipt and verification

First computed	2026-07-04T16:04:41.520871Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfa9ac9542d870e25fd7f2a0c946ce8a59386bdd1eeca3b9620dd79bfc5909a4

Aliases

arxiv: gr-qc/9712010 · arxiv_version: gr-qc/9712010v2 · doi: 10.48550/arxiv.gr-qc/9712010 · pith_short_12: Z6U2ZFKC3BYO · pith_short_16: Z6U2ZFKC3BYOEX6X · pith_short_8: Z6U2ZFKC

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/Z6U2ZFKC3BYOEX6X6KQMSRWORJ \
  | 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: cfa9ac9542d870e25fd7f2a0c946ce8a59386bdd1eeca3b9620dd79bfc5909a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80c3de32153ad342991300aeb5d6f9c4903ce8ad805a2d681485b9d324bc0f15",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1997-12-01T23:19:43Z",
    "title_canon_sha256": "a9a07bc7e40c035ea1c12eb98edc41a03d64b241991c80605259c13da7fa8408"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9712010",
    "kind": "arxiv",
    "version": 2
  }
}