Pith Number

pith:OD6CQUDK

pith:2013:OD6CQUDKOFUGK2HSX6NJUHV7CK

not attested not anchored not stored refs pending

Structural Induction Principles for Functional Programmers

James Caldwell (University of Wyoming)

arxiv:1312.2696 v1 · 2013-12-10 · cs.PL · 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{OD6CQUDKOFUGK2HSX6NJUHV7CK}

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	2026-05-18T03:05:09.119257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70fc28506a71686568f2bf9a9a1ebf12ad338fa0caec9c331edde362d618bdbc

Aliases

arxiv: 1312.2696 · arxiv_version: 1312.2696v1 · doi: 10.48550/arxiv.1312.2696 · pith_short_12: OD6CQUDKOFUG · pith_short_16: OD6CQUDKOFUGK2HS · pith_short_8: OD6CQUDK

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/OD6CQUDKOFUGK2HSX6NJUHV7CK \
  | 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: 70fc28506a71686568f2bf9a9a1ebf12ad338fa0caec9c331edde362d618bdbc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52cc5246394ad667100cda08277d32e3bf85706aa3ce21ad2af510e302f60696",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2013-12-10T08:00:53Z",
    "title_canon_sha256": "1dbd6a3ff869f4346ee8fe504b75b3a606b4c62083abecab640aecb226de2126"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.2696",
    "kind": "arxiv",
    "version": 1
  }
}