Pith Number

pith:JH72OFB5

pith:2016:JH72OFB5OSQZIO6JZ3CHWNCMZR

not attested not anchored not stored refs pending

Even Delta-Matroids and the Complexity of Planar Boolean CSPs

Alexandr Kazda, Michal Rol\'inek, Vladimir Kolmogorov

arxiv:1602.03124 v6 · 2016-02-09 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JH72OFB5OSQZIO6JZ3CHWNCMZR}

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	2026-05-18T00:13:19.810900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

49ffa7143d74a1943bc9cec47b344ccc60a5ed8c83bad37f77ce0c5ff38ad15c

Aliases

arxiv: 1602.03124 · arxiv_version: 1602.03124v6 · doi: 10.48550/arxiv.1602.03124 · pith_short_12: JH72OFB5OSQZ · pith_short_16: JH72OFB5OSQZIO6J · pith_short_8: JH72OFB5

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/JH72OFB5OSQZIO6JZ3CHWNCMZR \
  | 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: 49ffa7143d74a1943bc9cec47b344ccc60a5ed8c83bad37f77ce0c5ff38ad15c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e16f4f51e0e8e4608bfbb78b74287706521c266e0e11263974f925c422cd85cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2016-02-09T19:13:03Z",
    "title_canon_sha256": "4b13f5fb66059a282118ae51edae3a2df38f69aa802bf97e59aae22a8970de9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.03124",
    "kind": "arxiv",
    "version": 6
  }
}