Pith Number

pith:ZWPPGYIW

pith:2012:ZWPPGYIWDY7X5JLTCFDJIFXN4O

not attested not anchored not stored refs pending

On a coalgebraic view on Logic

Dirk Hofmann, Manuel A. Martins

arxiv:1202.0915 v1 · 2012-02-04 · math.LO · 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{ZWPPGYIWDY7X5JLTCFDJIFXN4O}

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	2026-05-18T04:03:05.776674Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd9ef361161e3f7ea57311469416ede3aaf72770370144e38aa9872dfb558491

Aliases

arxiv: 1202.0915 · arxiv_version: 1202.0915v1 · doi: 10.48550/arxiv.1202.0915 · pith_short_12: ZWPPGYIWDY7X · pith_short_16: ZWPPGYIWDY7X5JLT · pith_short_8: ZWPPGYIW

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/ZWPPGYIWDY7X5JLTCFDJIFXN4O \
  | 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: cd9ef361161e3f7ea57311469416ede3aaf72770370144e38aa9872dfb558491

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "449e5f1f6990c7300aee3b9ee432ac8232fd37d176c5d36e32703da425b4f5ad",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2012-02-04T18:56:47Z",
    "title_canon_sha256": "0a13ff4a0b3dad0cc849b163e5ed58feeab0962760d9f3d4e6d277c590457808"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.0915",
    "kind": "arxiv",
    "version": 1
  }
}