Pith Number

pith:GKMDVGGR

pith:2021:GKMDVGGRF2UXBUXNIVVPN36572

not attested not anchored not stored refs pending

Solving Challenging Large Scale QAPs

Kim-Chuan Toh, Koichi Fujii, Masakazu Kojima, Naoki Ito, Sunyoung Kim, Yuji Shinano

arxiv:2101.09629 v1 · 2021-01-24 · 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{GKMDVGGRF2UXBUXNIVVPN36572}

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	2026-07-05T02:09:21.232647Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32983a98d12ea970d2ed456af6efddfea57d32b9cb13dbbef25fa41c94624536

Aliases

arxiv: 2101.09629 · arxiv_version: 2101.09629v1 · doi: 10.48550/arxiv.2101.09629 · pith_short_12: GKMDVGGRF2UX · pith_short_16: GKMDVGGRF2UXBUXN · pith_short_8: GKMDVGGR

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/GKMDVGGRF2UXBUXNIVVPN36572 \
  | 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: 32983a98d12ea970d2ed456af6efddfea57d32b9cb13dbbef25fa41c94624536

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9c7414d7b4e58751e4e3068afe0ff755c6465d222f1eb5025fd14eade3abc8f9",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-01-24T02:13:33Z",
    "title_canon_sha256": "8ee17dff52db56d46e1d1bd5fa188fb977afbf952d4843ce9594c55c2580108a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.09629",
    "kind": "arxiv",
    "version": 1
  }
}