Pith Number

pith:42DBRXQO

pith:2016:42DBRXQOOOEMIGZH7HICVB6EIV

not attested not anchored not stored refs pending

Reasoning about Algebraic Data Types with Abstractions

Andrew Gacek, Michael W. Whalen, Tuan-Hung Pham

arxiv:1603.08769 v1 · 2016-03-29 · cs.LO · 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{42DBRXQOOOEMIGZH7HICVB6EIV}

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	2026-05-18T01:18:05.370706Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e68618de0e7388c41b27f9d02a87c4455d7fe0c0238c51f131cb32abd15fb768

Aliases

arxiv: 1603.08769 · arxiv_version: 1603.08769v1 · doi: 10.48550/arxiv.1603.08769 · pith_short_12: 42DBRXQOOOEM · pith_short_16: 42DBRXQOOOEMIGZH · pith_short_8: 42DBRXQO

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/42DBRXQOOOEMIGZH7HICVB6EIV \
  | 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: e68618de0e7388c41b27f9d02a87c4455d7fe0c0238c51f131cb32abd15fb768

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26dddacda2e3e282c9928a50f97e1a8248f8dc8982ee0774519376950388d51f",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2016-03-29T13:35:24Z",
    "title_canon_sha256": "f9f79500a8bf94a075a64ce278f3f1323374a52eccfd3d1043f55464619d3b13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.08769",
    "kind": "arxiv",
    "version": 1
  }
}