Pith Number

pith:YUSZU2LM

pith:2010:YUSZU2LM27YHABVQ3WGKRWTYGE

not attested not anchored not stored refs pending

Complexity of Existential Positive First-Order Logic

Florian Richoux, Manuel Bodirsky, Miki Hermann

arxiv:1011.4757 v2 · 2010-11-22 · cs.CC · 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{YUSZU2LM27YHABVQ3WGKRWTYGE}

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	2026-05-18T04:31:43.411353Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5259a696cd7f07006b0dd8ca8da783103dd269d80e3ef77907630074a5457d6

Aliases

arxiv: 1011.4757 · arxiv_version: 1011.4757v2 · doi: 10.48550/arxiv.1011.4757 · pith_short_12: YUSZU2LM27YH · pith_short_16: YUSZU2LM27YHABVQ · pith_short_8: YUSZU2LM

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/YUSZU2LM27YHABVQ3WGKRWTYGE \
  | 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: c5259a696cd7f07006b0dd8ca8da783103dd269d80e3ef77907630074a5457d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "841f0431fc5d57fb50bc966193654d7dfc679e24dfef731751f805ece99a6a4d",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2010-11-22T09:37:23Z",
    "title_canon_sha256": "cf271efaad51652c592b1b17584be52be8e8dae85d1c2046980f4b164ed0343b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.4757",
    "kind": "arxiv",
    "version": 2
  }
}