Pith Number

pith:6ZEWQB7S

pith:2007:6ZEWQB7SEAXBBR7JZHVPF6NUZT

not attested not anchored not stored refs pending

Automatic Structures: Richness and Limitations

Andre Nies, Bakhadyr Khoussainov, Frank Stephan, Sasha Rubin

arxiv:cs/0703064 v2 · 2007-03-13 · cs.DM · 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{6ZEWQB7SEAXBBR7JZHVPF6NUZT}

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	2026-05-18T00:53:03.210390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6496807f2202e10c7e9c9eaf2f9b4ccec51cd006aacf77efdad3abc14e39964

Aliases

arxiv: cs/0703064 · arxiv_version: cs/0703064v2 · doi: 10.48550/arxiv.cs/0703064 · pith_short_12: 6ZEWQB7SEAXB · pith_short_16: 6ZEWQB7SEAXBBR7J · pith_short_8: 6ZEWQB7S

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/6ZEWQB7SEAXBBR7JZHVPF6NUZT \
  | 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: f6496807f2202e10c7e9c9eaf2f9b4ccec51cd006aacf77efdad3abc14e39964

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06e1742433484d4072cec56f71abc424f3900c1df4a6ce4170fe224352713656",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "",
    "primary_cat": "cs.DM",
    "submitted_at": "2007-03-13T09:38:05Z",
    "title_canon_sha256": "46066b063a166dbde5856a1c5cdfad7fe465584d48333310aa88f7c801432ec8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0703064",
    "kind": "arxiv",
    "version": 2
  }
}