Pith Number

pith:SUUHECOJ

pith:2023:SUUHECOJPPDYFRSJYJLUD2IKX7

not attested not anchored not stored refs pending

A feasible method for solving an SDP relaxation of the quadratic knapsack problem

Kim-Chuan Toh, Tianyun Tang

arxiv:2303.06599 v1 · 2023-03-12 · 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{SUUHECOJPPDYFRSJYJLUD2IKX7}

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	2026-07-05T05:50:20.821737Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

95287209c97bc782c649c25741e90abfc8c270028d15891a89e7eaef864e2604

Aliases

arxiv: 2303.06599 · arxiv_version: 2303.06599v1 · doi: 10.48550/arxiv.2303.06599 · pith_short_12: SUUHECOJPPDY · pith_short_16: SUUHECOJPPDYFRSJ · pith_short_8: SUUHECOJ

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/SUUHECOJPPDYFRSJYJLUD2IKX7 \
  | 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: 95287209c97bc782c649c25741e90abfc8c270028d15891a89e7eaef864e2604

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87769a217fc8edb3c291ba7d1950a8e54498bcc5faed43904a17b2149319b7e3",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2023-03-12T07:50:54Z",
    "title_canon_sha256": "76e39c49ab322fdeec552dd695c7c850c4e5930276dbe3a0569c884be4bb36ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2303.06599",
    "kind": "arxiv",
    "version": 1
  }
}