Pith Number

pith:WQ7I5JCS

pith:2014:WQ7I5JCSMY7N55AJNQAGTZ2QHW

not attested not anchored not stored refs pending

Well-solvable cases of the QAP with block-structured matrices

Eranda \c{C}ela, Gerhard J. Woeginger, Vladimir G. Deineko

arxiv:1402.3500 v2 · 2014-02-14 · 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{WQ7I5JCSMY7N55AJNQAGTZ2QHW}

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	2026-05-18T02:57:16.405031Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b43e8ea452663edef4096c0069e7503d88d74b33febd8ac5dabd43182f522502

Aliases

arxiv: 1402.3500 · arxiv_version: 1402.3500v2 · doi: 10.48550/arxiv.1402.3500 · pith_short_12: WQ7I5JCSMY7N · pith_short_16: WQ7I5JCSMY7N55AJ · pith_short_8: WQ7I5JCS

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/WQ7I5JCSMY7N55AJNQAGTZ2QHW \
  | 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: b43e8ea452663edef4096c0069e7503d88d74b33febd8ac5dabd43182f522502

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f6018b2c2ea3a287373a1d8f80d4135646c913d6504aa6e60fdc43f57efda20",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-02-14T15:35:27Z",
    "title_canon_sha256": "2d5d413f8f921906523507a1508a9ef8bada7e50dbe45699b64543b67f608140"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.3500",
    "kind": "arxiv",
    "version": 2
  }
}