Pith Number

pith:DQPBXLHW

pith:2012:DQPBXLHWBANMY4NY3M4LLFWCDT

not attested not anchored not stored refs pending

Quantifier Alternation in Two-Variable First-Order Logic with Successor Is Decidable

Alexander Lauser, Manfred Kufleitner

arxiv:1212.6500 v1 · 2012-12-28 · cs.LO · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DQPBXLHWBANMY4NY3M4LLFWCDT}

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	2026-05-18T03:37:31.780479Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c1e1bacf6081acc71b8db38b596c21cf5dd4e0b4d9877185806811f25b6ca5d

Aliases

arxiv: 1212.6500 · arxiv_version: 1212.6500v1 · doi: 10.48550/arxiv.1212.6500 · pith_short_12: DQPBXLHWBANM · pith_short_16: DQPBXLHWBANMY4NY · pith_short_8: DQPBXLHW

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/DQPBXLHWBANMY4NY3M4LLFWCDT \
  | 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: 1c1e1bacf6081acc71b8db38b596c21cf5dd4e0b4d9877185806811f25b6ca5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e5362d9042e204bf1e2ac98e92b5dc6db9b43796f9ac2fcaf0210b02a683f1a",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-12-28T09:56:00Z",
    "title_canon_sha256": "e7ea1e4dddd51b8af728881179ce518623c2366ba7a251dfc9b73b744eabf399"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.6500",
    "kind": "arxiv",
    "version": 1
  }
}