Pith Number

pith:PZ4NKIGJ

pith:2010:PZ4NKIGJCTKLNI3SS2OWXZHEAX

not attested not anchored not stored refs pending

Non-Deterministic Kleene Coalgebras

Alexandra Silva (CWI), Jan Rutten (CWI, Leiden University), Marcello Bonsangue (LIACS, VUA + RUN)

arxiv:1007.3769 v3 · 2010-07-21 · 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{PZ4NKIGJCTKLNI3SS2OWXZHEAX}

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	2026-05-18T01:37:39.953688Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e78d520c914d4b6a372969d6be4e405d9f3e8bb8ee63f6325f48aea45421e5c

Aliases

arxiv: 1007.3769 · arxiv_version: 1007.3769v3 · doi: 10.48550/arxiv.1007.3769 · pith_short_12: PZ4NKIGJCTKL · pith_short_16: PZ4NKIGJCTKLNI3S · pith_short_8: PZ4NKIGJ

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/PZ4NKIGJCTKLNI3SS2OWXZHEAX \
  | 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: 7e78d520c914d4b6a372969d6be4e405d9f3e8bb8ee63f6325f48aea45421e5c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "378a46b33bfbcc49c86f4562aadacfe7237c29053192337ad43a39cd66117e38",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2010-07-21T21:57:36Z",
    "title_canon_sha256": "4100e664dbcbbcb48013d735ac8c9afe3721a8ca33c84997321b558c77007033"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.3769",
    "kind": "arxiv",
    "version": 3
  }
}