Pith Number

pith:BI6QVBJP

pith:2018:BI6QVBJPQ7IG5WX4XZEGYEBYCL

not attested not anchored not stored refs pending

Practical Optional Types for Clojure

Ambrose Bonnaire-Sergeant, Rowan Davies, Sam Tobin-Hochstadt

arxiv:1812.03571 v1 · 2018-12-09 · 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{BI6QVBJPQ7IG5WX4XZEGYEBYCL}

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	2026-05-17T23:58:44.403447Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a3d0a852f87d06edafcbe486c103812fe1e2148c2b111a5c466c3b3d3164959

Aliases

arxiv: 1812.03571 · arxiv_version: 1812.03571v1 · doi: 10.48550/arxiv.1812.03571 · pith_short_12: BI6QVBJPQ7IG · pith_short_16: BI6QVBJPQ7IG5WX4 · pith_short_8: BI6QVBJP

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/BI6QVBJPQ7IG5WX4XZEGYEBYCL \
  | 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: 0a3d0a852f87d06edafcbe486c103812fe1e2148c2b111a5c466c3b3d3164959

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "756180752ab820810e401e44c005f8a2336e49fbd15f9dfc0ff6483757e66e1b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2018-12-09T22:57:04Z",
    "title_canon_sha256": "2aeb72612661bc738a7435fc261a126ff68e5aa36a2864ba77b314c28cbf4080"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.03571",
    "kind": "arxiv",
    "version": 1
  }
}