Pith Number

pith:OMDTTK7G

pith:2006:OMDTTK7GXVFQ56QGONVKGN3OFY

not attested not anchored not stored refs pending

Cores of Countably Categorical Structures

Manuel Bodirsky

arxiv:cs/0612069 v2 · 2006-12-13 · 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{OMDTTK7GXVFQ56QGONVKGN3OFY}

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	2026-05-18T00:53:03.263016Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

730739abe6bd4b0efa06736aa3376e2e25d8d38f68070e06cb4ab9c71f62d47f

Aliases

arxiv: cs/0612069 · arxiv_version: cs/0612069v2 · doi: 10.48550/arxiv.cs/0612069 · pith_short_12: OMDTTK7GXVFQ · pith_short_16: OMDTTK7GXVFQ56QG · pith_short_8: OMDTTK7G

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/OMDTTK7GXVFQ56QGONVKGN3OFY \
  | 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: 730739abe6bd4b0efa06736aa3376e2e25d8d38f68070e06cb4ab9c71f62d47f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "509f8d6b859485f6657327de0d9fbec837a3f4bf4a9ea9967695360d5381d58e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.LO",
    "submitted_at": "2006-12-13T09:59:56Z",
    "title_canon_sha256": "4ff8538b4353c474e761fc5834389a8194f26207fe2ab49a1bd5d95ef0cf298b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0612069",
    "kind": "arxiv",
    "version": 2
  }
}