Pith Number

pith:NUC7OSSD

pith:2009:NUC7OSSDARONYC2ITLBEWXGFZL

not attested not anchored not stored refs pending

A rich hierarchy of functionals of finite types

Dag Normann

arxiv:0909.1198 v2 · 2009-09-07 · 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{NUC7OSSDARONYC2ITLBEWXGFZL}

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	2026-05-18T01:37:40.294044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d05f74a43045cdc0b489ac24b5cc5cae148d29a6ecae4573cf3051dbb57ddcd

Aliases

arxiv: 0909.1198 · arxiv_version: 0909.1198v2 · doi: 10.48550/arxiv.0909.1198 · pith_short_12: NUC7OSSDARON · pith_short_16: NUC7OSSDARONYC2I · pith_short_8: NUC7OSSD

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/NUC7OSSDARONYC2ITLBEWXGFZL \
  | 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: 6d05f74a43045cdc0b489ac24b5cc5cae148d29a6ecae4573cf3051dbb57ddcd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5d5f487eeda6c8d2f5f942f79cbf6914974a1385c571533ec4102e60772c3061",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2009-09-07T10:16:20Z",
    "title_canon_sha256": "022249606ed1496a2d68527bf9ed3c89d4867f83ea76327f7add759282e4b63f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1198",
    "kind": "arxiv",
    "version": 2
  }
}