Pith Number

pith:PDDKKEQN

pith:2018:PDDKKEQNTGAOY4YKTXT4GAML6D

not attested not anchored not stored refs pending

Expressivity within second-order transitive-closure logic

Flavio Ferrarotti, Jan Van den Bussche, Jonni Virtema

arxiv:1804.05926 v1 · 2018-04-16 · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PDDKKEQNTGAOY4YKTXT4GAML6D}

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	2026-05-18T00:18:22.341852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78c6a5120d9980ec730a9de7c3018bf0e96c998f94dc0a5af05935e3b35d907c

Aliases

arxiv: 1804.05926 · arxiv_version: 1804.05926v1 · doi: 10.48550/arxiv.1804.05926 · pith_short_12: PDDKKEQNTGAO · pith_short_16: PDDKKEQNTGAOY4YK · pith_short_8: PDDKKEQN

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/PDDKKEQNTGAOY4YKTXT4GAML6D \
  | 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: 78c6a5120d9980ec730a9de7c3018bf0e96c998f94dc0a5af05935e3b35d907c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d04d9f4e7728b32de50646f407d44a5adbd7ee057b9d69294164d0a0a8ff295",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2018-04-16T20:35:26Z",
    "title_canon_sha256": "80881ea4d3125bce1f6c7a696ea0a9c65d3b7b816c10e6c37212125f33e670da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.05926",
    "kind": "arxiv",
    "version": 1
  }
}