Pith Number

pith:OKG4H4QY

pith:2014:OKG4H4QYTS5XUNF5HIZT4RMVPK

not attested not anchored not stored refs pending

Spin foam models as energetic causal sets

Lee Smolin, Marina Cort\^es

arxiv:1407.0032 v2 · 2014-06-30 · 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{OKG4H4QYTS5XUNF5HIZT4RMVPK}

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

2 papers in Pith

Causal structure in spin-foams

Toller matrices and the Feynman $i\varepsilon$ in spinfoams

Receipt and verification

First computed	2026-05-18T01:16:19.123231Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

728dc3f2189cbb7a34bd3a333e45957a8b298602899cd110bb26a0d188033ba0

Aliases

arxiv: 1407.0032 · arxiv_version: 1407.0032v2 · doi: 10.48550/arxiv.1407.0032 · pith_short_12: OKG4H4QYTS5X · pith_short_16: OKG4H4QYTS5XUNF5 · pith_short_8: OKG4H4QY

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/OKG4H4QYTS5XUNF5HIZT4RMVPK \
  | 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: 728dc3f2189cbb7a34bd3a333e45957a8b298602899cd110bb26a0d188033ba0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05f69cf81d7c8c172b6c484fb1e493c743633adb6bd9079916268ceb8ec3a6c8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2014-06-30T20:01:01Z",
    "title_canon_sha256": "307a4532dbfe240b6c75f847d205dadd56e2a44b9ba91e02ef37215071fa1c73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.0032",
    "kind": "arxiv",
    "version": 2
  }
}