Pith Number

pith:HD2XFC7N

pith:2008:HD2XFC7NHUYIQ7W2QGMSGYEJU4

not attested not anchored not stored refs pending

On Termination for Faulty Channel Machines

James Worrell, Jo\"el Ouaknine, Nicolas Markey (LSV), Patricia Bouyer (LSV), Philippe Schnoebelen (LSV)

arxiv:0802.2839 v1 · 2008-02-20 · cs.IT · cs.CC · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HD2XFC7NHUYIQ7W2QGMSGYEJU4}

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	2026-05-18T01:11:27.846583Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

38f5728bed3d30887eda8199236089a73d555ec3bc30bcae8cf8fed6fd862634

Aliases

arxiv: 0802.2839 · arxiv_version: 0802.2839v1 · doi: 10.48550/arxiv.0802.2839 · pith_short_12: HD2XFC7NHUYI · pith_short_16: HD2XFC7NHUYIQ7W2 · pith_short_8: HD2XFC7N

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/HD2XFC7NHUYIQ7W2QGMSGYEJU4 \
  | 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: 38f5728bed3d30887eda8199236089a73d555ec3bc30bcae8cf8fed6fd862634

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f0cd2fcd7020da694faf960ebc6d452058c5a89e205f7e79b0e8bdd8a429f2a",
    "cross_cats_sorted": [
      "cs.CC",
      "math.IT"
    ],
    "license": "",
    "primary_cat": "cs.IT",
    "submitted_at": "2008-02-20T14:18:52Z",
    "title_canon_sha256": "d8e0bb693faefd6e568e8c30ffa60fc248ccb26ded006a72ad71c5927a9cf0f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.2839",
    "kind": "arxiv",
    "version": 1
  }
}