Pith Number

pith:63DSPJFP

pith:1995:63DSPJFPO2MFIHR5K2JMZYBT6O

not attested not anchored not stored refs pending

Free Differential Algebras: Their Use in Field Theory and Dual Formulation

Alberto Perotto, Leonardo Castellani

arxiv:hep-th/9509031 v1 · 1995-09-07 · 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{63DSPJFPO2MFIHR5K2JMZYBT6O}

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	2026-05-18T04:24:16.051121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6c727a4af7698541e3d5692cce033f395e86935a0c34065bdcadb734d9dd2c0

Aliases

arxiv: hep-th/9509031 · arxiv_version: hep-th/9509031v1 · doi: 10.48550/arxiv.hep-th/9509031 · pith_short_12: 63DSPJFPO2MF · pith_short_16: 63DSPJFPO2MFIHR5 · pith_short_8: 63DSPJFP

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/63DSPJFPO2MFIHR5K2JMZYBT6O \
  | 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: f6c727a4af7698541e3d5692cce033f395e86935a0c34065bdcadb734d9dd2c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "940aa4a4601170021db0bb311bd359fc9d09a453a7bb62603b2eda22076fc5ec",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "1995-09-07T10:45:19Z",
    "title_canon_sha256": "026509eb19fe56d782a65fd18b80d4e2e55faa4b83f697eeaed89e2701e71515"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/9509031",
    "kind": "arxiv",
    "version": 1
  }
}