Pith Number

pith:P6GMAID7

pith:2019:P6GMAID72AK32EIVYNIZJ6HWGZ

not attested not anchored not stored refs pending

A proximal DC approach for quadratic assignment problem

Chao Ding, Xinyuan Zhao, Zhuoxuan Jiang

arxiv:1908.04522 v1 · 2019-08-13 · 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{P6GMAID72AK32EIVYNIZJ6HWGZ}

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	2026-07-04T23:55:14.503379Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f8cc0207fd015bd1115c35194f8f63674106df8ad6ba6678c2c267297d7ee49

Aliases

arxiv: 1908.04522 · arxiv_version: 1908.04522v1 · doi: 10.48550/arxiv.1908.04522 · pith_short_12: P6GMAID72AK3 · pith_short_16: P6GMAID72AK32EIV · pith_short_8: P6GMAID7

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/P6GMAID72AK32EIVYNIZJ6HWGZ \
  | 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: 7f8cc0207fd015bd1115c35194f8f63674106df8ad6ba6678c2c267297d7ee49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c098988fb20b389d0024470aee0a761fea0f8f4b1637a2d2c65f4267d8ed632e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-08-13T07:34:57Z",
    "title_canon_sha256": "689fcb785ab768a24e11952e5a19d30b96daa5a14ee0b88074999a5de30612ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.04522",
    "kind": "arxiv",
    "version": 1
  }
}