Pith Number

pith:QFZUIM72

pith:2009:QFZUIM72YI36Y7TXV3PAIR4MXN

not attested not anchored not stored refs pending

Orthomodular lattices, Foulis Semigroups and Dagger Kernel Categories

Bart Jacobs

arxiv:0912.0931 v3 · 2009-12-04 · 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{QFZUIM72YI36Y7TXV3PAIR4MXN}

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	2026-05-18T01:37:40.226207Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81734433fac237ec7e77aede04478cbb7fd435663e3ec22790971fc49b9b9542

Aliases

arxiv: 0912.0931 · arxiv_version: 0912.0931v3 · doi: 10.48550/arxiv.0912.0931 · pith_short_12: QFZUIM72YI36 · pith_short_16: QFZUIM72YI36Y7TX · pith_short_8: QFZUIM72

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/QFZUIM72YI36Y7TXV3PAIR4MXN \
  | 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: 81734433fac237ec7e77aede04478cbb7fd435663e3ec22790971fc49b9b9542

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "484ef9a7e6aa7676976b0778e1eb43c6816294731798c082798da196ca9fcf36",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2009-12-04T20:36:49Z",
    "title_canon_sha256": "c677288b883d335131e736feac0fa5c24c756e4160715d54a71ab372b42a00a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0931",
    "kind": "arxiv",
    "version": 3
  }
}