Pith Number

pith:UQ2E5FA6

pith:2016:UQ2E5FA66BH7SSVQVN2OUULIS3

not attested not anchored not stored refs pending

Hazelnut: A Bidirectionally Typed Structure Editor Calculus

Cyrus Omar, Ian Voysey, Jonathan Aldrich, Matthew A. Hammer, Michael Hilton

arxiv:1607.04180 v5 · 2016-07-14 · 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{UQ2E5FA66BH7SSVQVN2OUULIS3}

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	2026-05-17T23:54:57.057435Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4344e941ef04ff94ab0ab74ea516896e1bd6dbc41b020ee159741bdc1047017

Aliases

arxiv: 1607.04180 · arxiv_version: 1607.04180v5 · doi: 10.48550/arxiv.1607.04180 · pith_short_12: UQ2E5FA66BH7 · pith_short_16: UQ2E5FA66BH7SSVQ · pith_short_8: UQ2E5FA6

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/UQ2E5FA66BH7SSVQVN2OUULIS3 \
  | 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: a4344e941ef04ff94ab0ab74ea516896e1bd6dbc41b020ee159741bdc1047017

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4ac05aed1f6ac30dcfb759a98b978d5125eeff32364258d23b20a8f50e0e554",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2016-07-14T16:07:29Z",
    "title_canon_sha256": "8194db7c020d4ba0d6fa0fdeb16cf178a9f442d505311ec08b485bfc02242234"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.04180",
    "kind": "arxiv",
    "version": 5
  }
}