Pith Number

pith:EDEYEWLO

pith:2012:EDEYEWLOEK6LNDFLZ6DZT6M5TD

not attested not anchored not stored refs pending

Classical lambda calculus in modern dress

Martin Hyland

arxiv:1211.5762 v2 · 2012-11-25 · math.CT · math.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{EDEYEWLOEK6LNDFLZ6DZT6M5TD}

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	2026-05-18T01:36:36.252380Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20c982596e22bcb68cabcf8799f99d98d9c972df22d15577a0f38e91d1ca32b0

Aliases

arxiv: 1211.5762 · arxiv_version: 1211.5762v2 · doi: 10.48550/arxiv.1211.5762 · pith_short_12: EDEYEWLOEK6L · pith_short_16: EDEYEWLOEK6LNDFL · pith_short_8: EDEYEWLO

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/EDEYEWLOEK6LNDFLZ6DZT6M5TD \
  | 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: 20c982596e22bcb68cabcf8799f99d98d9c972df22d15577a0f38e91d1ca32b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32e512aea4f75b365c8790772ff8d7d7da61ad5e02384e7e567f0f3b535eca38",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2012-11-25T12:48:05Z",
    "title_canon_sha256": "d01b80610077aba8fb14f2447f2d4db4a1e473894becb59fa9e6ef028b7136ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.5762",
    "kind": "arxiv",
    "version": 2
  }
}