Pith Number

pith:37DK75JC

pith:2019:37DK75JCVMD3J7VWB7XTOB4NTO

not attested not anchored not stored refs pending

Structural and semantic pattern matching analysis in Haskell

Pavel Kalvoda, Tom Sydney Kerckhove

arxiv:1909.04160 v1 · 2019-09-09 · cs.PL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{37DK75JCVMD3J7VWB7XTOB4NTO}

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	2026-07-05T00:03:19.228130Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dfc6aff522ab07b4feb60fef37078d9baca4c9bf4ea57c5cd226aef1b2ed48f7

Aliases

arxiv: 1909.04160 · arxiv_version: 1909.04160v1 · doi: 10.48550/arxiv.1909.04160 · pith_short_12: 37DK75JCVMD3 · pith_short_16: 37DK75JCVMD3J7VW · pith_short_8: 37DK75JC

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/37DK75JCVMD3J7VWB7XTOB4NTO \
  | 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: dfc6aff522ab07b4feb60fef37078d9baca4c9bf4ea57c5cd226aef1b2ed48f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d22dcf337a9e1744c25d1691a527301e73f8886f69ac415572b735ff8191782",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2019-09-09T21:13:38Z",
    "title_canon_sha256": "af98b0c42f67f67f934866ff14c3d5d07ed43ddd1f88a611f5ecfc6f69150c47"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.04160",
    "kind": "arxiv",
    "version": 1
  }
}