Pith Number

pith:YPQ545YL

pith:2013:YPQ545YLLNFGX2A63KNLNYGD4G

not attested not anchored not stored refs pending

Algorithm 950: Ncpol2sdpa---Sparse Semidefinite Programming Relaxations for Polynomial Optimization Problems of Noncommuting Variables

Peter Wittek

arxiv:1308.6029 v3 · 2013-08-28 · cs.MS · math.OC · physics.comp-ph · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YPQ545YLLNFGX2A63KNLNYGD4G}

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	2026-05-18T01:51:25.368039Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3e1de770b5b4a6be81eda9ab6e0c3e1b6f007741a5adcfa1d61b2d96e9912f9

Aliases

arxiv: 1308.6029 · arxiv_version: 1308.6029v3 · doi: 10.48550/arxiv.1308.6029 · pith_short_12: YPQ545YLLNFG · pith_short_16: YPQ545YLLNFGX2A6 · pith_short_8: YPQ545YL

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/YPQ545YLLNFGX2A63KNLNYGD4G \
  | 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: c3e1de770b5b4a6be81eda9ab6e0c3e1b6f007741a5adcfa1d61b2d96e9912f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cce47c02db3a4b452f9ce2684cf3fb57f2cd686fd8b85a58f010b97f6cba909b",
    "cross_cats_sorted": [
      "math.OC",
      "physics.comp-ph",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2013-08-28T02:14:20Z",
    "title_canon_sha256": "221bdc16ce317e258d7aebd4c99529c4d44dfb2c5c45b70771b3cd44933769e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.6029",
    "kind": "arxiv",
    "version": 3
  }
}