Pith Number

pith:JLF4P4JT

pith:2013:JLF4P4JTTLIKVNE23FEV6OPMAZ

not attested not anchored not stored refs pending

Spin foams

Jonathan Engle

arxiv:1303.4636 v1 · 2013-03-19 · 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{JLF4P4JTTLIKVNE23FEV6OPMAZ}

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	2026-05-18T01:51:00.716803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4acbc7f1339ad0aab49ad9495f39ec065281a30bac505d2be51eb68e25a1d7d1

Aliases

arxiv: 1303.4636 · arxiv_version: 1303.4636v1 · doi: 10.48550/arxiv.1303.4636 · pith_short_12: JLF4P4JTTLIK · pith_short_16: JLF4P4JTTLIKVNE2 · pith_short_8: JLF4P4JT

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/JLF4P4JTTLIKVNE23FEV6OPMAZ \
  | 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: 4acbc7f1339ad0aab49ad9495f39ec065281a30bac505d2be51eb68e25a1d7d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf14f403c38e2f9e33b0864dc013a180209833f8a796bf715ff6a228f30a6bb5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2013-03-19T15:26:06Z",
    "title_canon_sha256": "7d0cfcd7163065ecb89d03652cfe4066f4059ad8b35e12882c58b5d2e5303102"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.4636",
    "kind": "arxiv",
    "version": 1
  }
}