Pith Number

pith:6BDLYUJD

pith:2014:6BDLYUJDRELDGQ3DMB3V2TMQ42

not attested not anchored not stored refs pending

Extensionality of lambda-*

Andrew Polonsky

arxiv:1401.1139 v1 · 2014-01-06 · cs.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{6BDLYUJDRELDGQ3DMB3V2TMQ42}

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	2026-05-18T03:03:10.813136Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f046bc5123891633436360775d4d90e68575a22b6b36f2037a58e89c1ccdfc0a

Aliases

arxiv: 1401.1139 · arxiv_version: 1401.1139v1 · doi: 10.48550/arxiv.1401.1139 · pith_short_12: 6BDLYUJDRELD · pith_short_16: 6BDLYUJDRELDGQ3D · pith_short_8: 6BDLYUJD

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/6BDLYUJDRELDGQ3DMB3V2TMQ42 \
  | 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: f046bc5123891633436360775d4d90e68575a22b6b36f2037a58e89c1ccdfc0a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b3ec6f4c91770cfd7abfb3b157ede47eb602fd0d39cb5ee1c90d783f7b799ce",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2014-01-06T17:03:53Z",
    "title_canon_sha256": "ca7bf1f4be32cf2dcd3701c200585e075e38f45d68617a340767ecd57cadb809"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.1139",
    "kind": "arxiv",
    "version": 1
  }
}