Pith Number

pith:WIVUPB23

pith:2007:WIVUPB23THGFNNOKGILPUIV2YS

not attested not anchored not stored refs pending

Two algorithms in search of a type system

James S. Royer, Norman Danner

arxiv:0710.0824 v2 · 2007-10-03 · cs.LO · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WIVUPB23THGFNNOKGILPUIV2YS}

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	2026-07-04T15:10:56.305904Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b22b47875b99cc56b5ca3216fa22bac4b17b76e4421e763f7fa23f0ddadd5f02

Aliases

arxiv: 0710.0824 · arxiv_version: 0710.0824v2 · doi: 10.48550/arxiv.0710.0824 · pith_short_12: WIVUPB23THGF · pith_short_16: WIVUPB23THGFNNOK · pith_short_8: WIVUPB23

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/WIVUPB23THGFNNOKGILPUIV2YS \
  | 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: b22b47875b99cc56b5ca3216fa22bac4b17b76e4421e763f7fa23f0ddadd5f02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f6249170800f62b67b477de30748adc14a625fe11ec6a9be6f593d1aa8ba0165",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "",
    "primary_cat": "cs.LO",
    "submitted_at": "2007-10-03T16:04:59Z",
    "title_canon_sha256": "d3a074b1f92a9189c0e8313a8e99841a89075e2b6ff07bbfe820a330de30ac25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0710.0824",
    "kind": "arxiv",
    "version": 2
  }
}