Pith Number

pith:GNVPYDMN

pith:2022:GNVPYDMNZJYBYSCTKLCCM5CWRT

not attested not anchored not stored refs pending

The Largest Unsolved QAP Instance Tai256c Can Be Converted into A 256-dimensional Simple BQOP with A Single Cardinality Constraint

Hans D. Mittelmann, Koichi Fujii, Masakazu Kojima, Sunyoung Kim, Yuji Shinano

arxiv:2210.15963 v1 · 2022-10-28 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GNVPYDMNZJYBYSCTKLCCM5CWRT}

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	2026-07-05T05:11:28.888872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

336afc0d8dca701c485352c42674568cf462d25aadfacf58cd6a8611e395fb4b

Aliases

arxiv: 2210.15963 · arxiv_version: 2210.15963v1 · doi: 10.48550/arxiv.2210.15963 · pith_short_12: GNVPYDMNZJYB · pith_short_16: GNVPYDMNZJYBYSCT · pith_short_8: GNVPYDMN

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/GNVPYDMNZJYBYSCTKLCCM5CWRT \
  | 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: 336afc0d8dca701c485352c42674568cf462d25aadfacf58cd6a8611e395fb4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5b80a0ee8c184bf2c93a6256e77a77045ad927359a209a1d970c11497917171",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2022-10-28T07:51:40Z",
    "title_canon_sha256": "149dd9007af7a866c32d6184ac49f3bb30bb2c0a4f84a923f84d3080ad70e118"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2210.15963",
    "kind": "arxiv",
    "version": 1
  }
}