Pith Number

pith:HBBQUGE4

pith:2016:HBBQUGE47ZWKQ4WH6FYSCJDMAC

not attested not anchored not stored refs pending

Hawking radiation from acoustic black holes in two space dimensions

Gregory Eskin

arxiv:1608.05860 v5 · 2016-08-20 · gr-qc · math-ph · math.AP · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HBBQUGE47ZWKQ4WH6FYSCJDMAC}

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	2026-05-18T00:10:48.136301Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

38430a189cfe6ca872c7f17121246c0084ff076b738e56fa96326dfa75a68e27

Aliases

arxiv: 1608.05860 · arxiv_version: 1608.05860v5 · doi: 10.48550/arxiv.1608.05860 · pith_short_12: HBBQUGE47ZWK · pith_short_16: HBBQUGE47ZWKQ4WH · pith_short_8: HBBQUGE4

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/HBBQUGE47ZWKQ4WH6FYSCJDMAC \
  | 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: 38430a189cfe6ca872c7f17121246c0084ff076b738e56fa96326dfa75a68e27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df27d96d192b0ba2c917ffc26670d7a96c012bb126865940f4c49d80fa288a5e",
    "cross_cats_sorted": [
      "math-ph",
      "math.AP",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2016-08-20T18:32:46Z",
    "title_canon_sha256": "6d27d93a51714e47ad93edc4f97e31ebc5ade3caa55e2abc86db5984db689355"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.05860",
    "kind": "arxiv",
    "version": 5
  }
}