Pith Number

pith:43VYN4MD

pith:2025:43VYN4MDE4DK6OOTYNII4NMT2D

not attested not anchored not stored refs pending

Hybrid Quantum-Classical Branch-and-Price Method for the Vertex Coloring Problem

Alberto Scionti, Bartolomeo Montrucchio, Chiara Vercellino, Giacomo Vitali, M. Yassine Naghmouchi, Olivier Terzo, Paolo Viviani, Wesley Coelho

arxiv:2508.18887 v1 · 2025-08-26 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{43VYN4MDE4DK6OOTYNII4NMT2D}

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	2026-07-05T11:59:33.173414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6eb86f1832706af39d3c3508e3593d0e986f5343e8d086c48e1283f1186d2a7

Aliases

arxiv: 2508.18887 · arxiv_version: 2508.18887v1 · doi: 10.48550/arxiv.2508.18887 · pith_short_12: 43VYN4MDE4DK · pith_short_16: 43VYN4MDE4DK6OOT · pith_short_8: 43VYN4MD

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/43VYN4MDE4DK6OOTYNII4NMT2D \
  | 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: e6eb86f1832706af39d3c3508e3593d0e986f5343e8d086c48e1283f1186d2a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d554171bf99ecee8a0432a567bc1293f789c2975b008a91c3da571355b50d134",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-08-26T10:03:56Z",
    "title_canon_sha256": "84bef7ac12e2af7ef2f6cf28a44d74eeea971ac101e8ed15c091375f334ef6ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.18887",
    "kind": "arxiv",
    "version": 1
  }
}