Pith Number

pith:EH4WVKPA

pith:2012:EH4WVKPAHF7ODGZRO56PNBWTA7

not attested not anchored not stored refs pending

Layered Fixed Point Logic

Flemming Nielson, Hanne Riis Nielson, Piotr Filipiuk

arxiv:1204.2768 v1 · 2012-04-12 · 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{EH4WVKPAHF7ODGZRO56PNBWTA7}

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	2026-05-18T03:58:03.578961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21f96aa9e0397ee19b31777cf686d307c5664193871394de907c469704a25173

Aliases

arxiv: 1204.2768 · arxiv_version: 1204.2768v1 · doi: 10.48550/arxiv.1204.2768 · pith_short_12: EH4WVKPAHF7O · pith_short_16: EH4WVKPAHF7ODGZR · pith_short_8: EH4WVKPA

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/EH4WVKPAHF7ODGZRO56PNBWTA7 \
  | 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: 21f96aa9e0397ee19b31777cf686d307c5664193871394de907c469704a25173

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b33482e97f392959bdd6927a55f7871e700da3244eee9702e8b4005e4dd26151",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-04-12T16:35:36Z",
    "title_canon_sha256": "4b53f8f3ceedf20bb8d45b359fe21e820d05bc050218587714f0e0b7a3af4635"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2768",
    "kind": "arxiv",
    "version": 1
  }
}