Pith Number

pith:RY45PKBP

pith:2011:RY45PKBPDJ2IX3O7J6KOS5TQVY

not attested not anchored not stored refs pending

Kochen-Specker Sets and the Rank-1 Quantum Chromatic Number

Giannicola Scarpa, Simone Severini

arxiv:1106.0712 v1 · 2011-06-03 · quant-ph · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RY45PKBPDJ2IX3O7J6KOS5TQVY}

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	2026-05-18T04:01:51.047430Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e39d7a82f1a748beddf4f94e97670ae1bce58ad75284eb224173e61364481d2

Aliases

arxiv: 1106.0712 · arxiv_version: 1106.0712v1 · doi: 10.48550/arxiv.1106.0712 · pith_short_12: RY45PKBPDJ2I · pith_short_16: RY45PKBPDJ2IX3O7 · pith_short_8: RY45PKBP

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/RY45PKBPDJ2IX3O7J6KOS5TQVY \
  | 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: 8e39d7a82f1a748beddf4f94e97670ae1bce58ad75284eb224173e61364481d2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b36e3528ba06498c9ba6dc7cb024b7de3d2b70adf0f4a3f832f8f54b53d2e2ab",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2011-06-03T17:37:40Z",
    "title_canon_sha256": "2da801b95985b6fe2f00b7e77b9f6dd8dd44b4428f8497b0334c69dc7519c27c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.0712",
    "kind": "arxiv",
    "version": 1
  }
}