Pith Number

pith:BOK2G2FV

pith:2019:BOK2G2FVZNATOX5NZD5P7FHOTP

not attested not anchored not stored refs pending

The hessian in spin foam models

Hanno Sahlmann, Wojciech Kaminski

arxiv:1906.05258 v1 · 2019-06-12 · 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{BOK2G2FVZNATOX5NZD5P7FHOTP}

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	2026-07-05T00:31:06.614945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b95a368b5cb41375fadc8faff94ee9bc0d779b128aa1e2a525b80fa773e336e

Aliases

arxiv: 1906.05258 · arxiv_version: 1906.05258v1 · doi: 10.48550/arxiv.1906.05258 · pith_short_12: BOK2G2FVZNAT · pith_short_16: BOK2G2FVZNATOX5N · pith_short_8: BOK2G2FV

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/BOK2G2FVZNATOX5NZD5P7FHOTP \
  | 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: 0b95a368b5cb41375fadc8faff94ee9bc0d779b128aa1e2a525b80fa773e336e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0f82055bb4e70c085d83a9d36583c49de9aaa747898660c7c415219878bbf28",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2019-06-12T17:32:13Z",
    "title_canon_sha256": "4b51761b14994ae9f1a5bb532690013c6ea9b8917bfe97e994c8b30419f8c110"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.05258",
    "kind": "arxiv",
    "version": 1
  }
}