Pith Number

pith:UDELJN63

pith:2005:UDELJN63TKN73PQN3RPKOZJVII

not attested not anchored not stored refs pending

A quantum protocol to win the graph colouring game on all Hadamard graphs

David Avis, Jun Hasegawa, Yosuke Kikuchi, Yuuya Sasaki

arxiv:quant-ph/0509047 v4 · 2005-09-07 · 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{UDELJN63TKN73PQN3RPKOZJVII}

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	2026-05-18T01:37:57.472081Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0c8b4b7db9a9bfdbe0ddc5ea7653542313c35c8222507fd9496894d922d36e6

Aliases

arxiv: quant-ph/0509047 · arxiv_version: quant-ph/0509047v4 · doi: 10.48550/arxiv.quant-ph/0509047 · pith_short_12: UDELJN63TKN7 · pith_short_16: UDELJN63TKN73PQN · pith_short_8: UDELJN63

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/UDELJN63TKN73PQN3RPKOZJVII \
  | 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: a0c8b4b7db9a9bfdbe0ddc5ea7653542313c35c8222507fd9496894d922d36e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f08f543aec2225d2f85d15d822f2550b58c4a3d63ea3fb47db0fc301f1607a60",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2005-09-07T07:43:29Z",
    "title_canon_sha256": "3c93d8e3b724a62a883cf04f85d42a5a4906487f05e94555b6279ac5c5c4ac88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0509047",
    "kind": "arxiv",
    "version": 4
  }
}