Pith Number

pith:5VRYK7WP

pith:2012:5VRYK7WPWCKEGLU5WMNHBRW6QW

not attested not anchored not stored refs pending

An Algebraic Preservation Theorem for Aleph-Zero Categorical Quantified Constraint Satisfaction

Hubie Chen (Univ. Pompeu Fabra), Moritz M\"uller (Kurt G\"odel Research Center, Universit\"at Wien)

arxiv:1207.6696 v3 · 2012-07-28 · cs.LO · cs.CC · 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{5VRYK7WPWCKEGLU5WMNHBRW6QW}

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	2026-05-18T01:37:38.641841Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ed63857ecfb094432e9db31a70c6de8591d264527f46faaad7b7215bfc16904d

Aliases

arxiv: 1207.6696 · arxiv_version: 1207.6696v3 · doi: 10.48550/arxiv.1207.6696 · pith_short_12: 5VRYK7WPWCKE · pith_short_16: 5VRYK7WPWCKEGLU5 · pith_short_8: 5VRYK7WP

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/5VRYK7WPWCKEGLU5WMNHBRW6QW \
  | 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: ed63857ecfb094432e9db31a70c6de8591d264527f46faaad7b7215bfc16904d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fae1c6b87c2253da2ce035716716d0c7705ecaeeb76a798a93cbcd8a1b6f8f4f",
    "cross_cats_sorted": [
      "cs.CC",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-07-28T11:36:09Z",
    "title_canon_sha256": "4866bed2ec3eee39947c352010bb18ba3441fea86f30e4877ac621137934784c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.6696",
    "kind": "arxiv",
    "version": 3
  }
}