Pith Number

pith:NMAFNNFK

pith:2012:NMAFNNFKDDPVWAD2RQC7G2AS6L

not attested not anchored not stored refs pending

A Simplified Characterisation of Provably Computable Functions of the System ID_1 of Inductive Definitions

Andreas Weiermann, Naohi Eguchi

arxiv:1205.2879 v1 · 2012-05-13 · 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{NMAFNNFKDDPVWAD2RQC7G2AS6L}

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	2026-05-18T03:55:45.766213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b0056b4aa18df5b007a8c05f36812f2e1f4b2896d66b400a690061c745f0843

Aliases

arxiv: 1205.2879 · arxiv_version: 1205.2879v1 · doi: 10.48550/arxiv.1205.2879 · pith_short_12: NMAFNNFKDDPV · pith_short_16: NMAFNNFKDDPVWAD2 · pith_short_8: NMAFNNFK

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/NMAFNNFKDDPVWAD2RQC7G2AS6L \
  | 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: 6b0056b4aa18df5b007a8c05f36812f2e1f4b2896d66b400a690061c745f0843

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9d70c4b8e9699634cc9b92cfae4b6a47b870c33655b50c9d9e8546ef3c010dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2012-05-13T16:17:03Z",
    "title_canon_sha256": "9b8a9715b1ca17f9e1d1ed8ab697033a40e7ee4f45274238571f890149ad0e99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.2879",
    "kind": "arxiv",
    "version": 1
  }
}