Pith Number

pith:P6PUVYK3

pith:2005:P6PUVYK3HWMQKQIFZOGCEKKLHR

not attested not anchored not stored refs pending

Strong normalisation for applied lambda calculi

Ulrich Berger

arxiv:cs/0507007 v4 · 2005-07-04 · cs.GT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P6PUVYK3HWMQKQIFZOGCEKKLHR}

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	2026-05-18T00:53:03.481291Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f9f4ae15b3d99054105cb8c22294b3c47930066dea36cec31c52dc2465b9bb4

Aliases

arxiv: cs/0507007 · arxiv_version: cs/0507007v4 · doi: 10.48550/arxiv.cs/0507007 · pith_short_12: P6PUVYK3HWMQ · pith_short_16: P6PUVYK3HWMQKQIF · pith_short_8: P6PUVYK3

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/P6PUVYK3HWMQKQIFZOGCEKKLHR \
  | 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: 7f9f4ae15b3d99054105cb8c22294b3c47930066dea36cec31c52dc2465b9bb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5671ed0af3b836840a2ae181fdf3d7f21bd5d0320403f1a03eb0272db741c767",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.GT",
    "submitted_at": "2005-07-04T18:49:48Z",
    "title_canon_sha256": "de0aa801dc67656320bdc41bab47925a3ae6d622859a1b1354fc85b95a674c0d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0507007",
    "kind": "arxiv",
    "version": 4
  }
}