Pith Number

pith:HHFH65HX

pith:2013:HHFH65HXCPRBFUDLGFRR6JHLLT

not attested not anchored not stored refs pending

Imperative Programs as Proofs via Game Semantics

Guy McCusker, Jim Laird, Martin Churchill

arxiv:1307.2004 v1 · 2013-07-08 · 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{HHFH65HXCPRBFUDLGFRR6JHLLT}

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	2026-05-18T03:19:02.808633Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39ca7f74f713e212d06b31631f24eb5cf2125bcfecb6f3a6c946d5f721afcb19

Aliases

arxiv: 1307.2004 · arxiv_version: 1307.2004v1 · doi: 10.48550/arxiv.1307.2004 · pith_short_12: HHFH65HXCPRB · pith_short_16: HHFH65HXCPRBFUDL · pith_short_8: HHFH65HX

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/HHFH65HXCPRBFUDLGFRR6JHLLT \
  | 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: 39ca7f74f713e212d06b31631f24eb5cf2125bcfecb6f3a6c946d5f721afcb19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6dea6b959bbce778373beb5ba1564af30ac97cf3c5ecfa206a52ff91b89b18ac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2013-07-08T09:36:39Z",
    "title_canon_sha256": "724dd5b73b9959aacd45a2e0abdf67af2665b0f202bedb9336ad8ea110a060fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2004",
    "kind": "arxiv",
    "version": 1
  }
}