Pith Number

pith:RPH54OD4

pith:2015:RPH54OD45U7VSTQURQRV75ZFHF

not attested not anchored not stored refs pending

Monadic second order finite satisfiability and unbounded tree-width

Florian Zuleger, Helmut Veith, Tomer Kotek

arxiv:1505.06622 v2 · 2015-05-25 · 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{RPH54OD45U7VSTQURQRV75ZFHF}

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	2026-05-18T01:17:00.770928Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8bcfde387ced3f594e148c235ff725396cfbaa8955a5d86d5c91ec25a0ebe37c

Aliases

arxiv: 1505.06622 · arxiv_version: 1505.06622v2 · doi: 10.48550/arxiv.1505.06622 · pith_short_12: RPH54OD45U7V · pith_short_16: RPH54OD45U7VSTQU · pith_short_8: RPH54OD4

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/RPH54OD45U7VSTQURQRV75ZFHF \
  | 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: 8bcfde387ced3f594e148c235ff725396cfbaa8955a5d86d5c91ec25a0ebe37c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf1dcbf759bb459a51c3080416095d1315632085031c74e0e7b0c52efc0704e1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2015-05-25T13:31:45Z",
    "title_canon_sha256": "28eff39796a12b89f81cbd395d67d72e91ada4ce6b03313ff919241eb538e707"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.06622",
    "kind": "arxiv",
    "version": 2
  }
}