Pith Number

pith:S7KZBYST

pith:2017:S7KZBYST34OMZWLTXF5HAEM6MG

not attested not anchored not stored refs pending

An Executable Specification of Typing Rules for Extensible Records based on Row Polymorphism

Ki Yung Ahn

arxiv:1707.07872 v2 · 2017-07-25 · 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{S7KZBYST34OMZWLTXF5HAEM6MG}

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	2026-05-18T00:35:30.816623Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

97d590e253df1cccd973b97a70119e61a91f9e049c72ae83ad22c66a813701ac

Aliases

arxiv: 1707.07872 · arxiv_version: 1707.07872v2 · doi: 10.48550/arxiv.1707.07872 · pith_short_12: S7KZBYST34OM · pith_short_16: S7KZBYST34OMZWLT · pith_short_8: S7KZBYST

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/S7KZBYST34OMZWLTXF5HAEM6MG \
  | 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: 97d590e253df1cccd973b97a70119e61a91f9e049c72ae83ad22c66a813701ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "881711cc6ef64b054dc672b478ae60bf05d58111859c9b80484d1c8548847a30",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2017-07-25T09:36:10Z",
    "title_canon_sha256": "051c1b79b4173e129b9a31914311d3d3585bc2786480d33270047890c32314e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.07872",
    "kind": "arxiv",
    "version": 2
  }
}