Pith Number

pith:JP56IGLF

pith:2008:JP56IGLFUO6MA427JXAZ45GTPX

not attested not anchored not stored refs pending

A concrete co-existential map that is not confluent

Klaas Pieter Hart

arxiv:0808.2881 v2 · 2008-08-21 · math.GN · 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{JP56IGLFUO6MA427JXAZ45GTPX}

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	2026-05-18T04:13:55.412886Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4bfbe41965a3bcc0735f4dc19e74d37dd9cd7ec75d62207cc5573af4ed000670

Aliases

arxiv: 0808.2881 · arxiv_version: 0808.2881v2 · doi: 10.48550/arxiv.0808.2881 · pith_short_12: JP56IGLFUO6M · pith_short_16: JP56IGLFUO6MA427 · pith_short_8: JP56IGLF

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/JP56IGLFUO6MA427JXAZ45GTPX \
  | 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: 4bfbe41965a3bcc0735f4dc19e74d37dd9cd7ec75d62207cc5573af4ed000670

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5736b75e4e2d33053320db96346c026e0a53d2829b309a594952ca1654e1eade",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2008-08-21T07:56:56Z",
    "title_canon_sha256": "1d465b8651c434204f53d5aaad167abc230f68d702c9d3423b123fb89401f383"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0808.2881",
    "kind": "arxiv",
    "version": 2
  }
}