Pith Number

pith:SWGFGIFO

pith:2015:SWGFGIFOXT2SOL3MQO4TSVJXHG

not attested not anchored not stored refs pending

Positive Semi-Definiteness and Sum-of-Squares Property of Fourth Order Four Dimensional Hankel Tensors

Liqun Qi, Qun Wang, Yannan Chen

arxiv:1502.04566 v8 · 2015-02-16 · math.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SWGFGIFOXT2SOL3MQO4TSVJXHG}

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	2026-05-18T02:20:39.318842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

958c5320aebcf5272f6c83b939553739942d17dba5f056f51277b6e083a1609f

Aliases

arxiv: 1502.04566 · arxiv_version: 1502.04566v8 · doi: 10.48550/arxiv.1502.04566 · pith_short_12: SWGFGIFOXT2S · pith_short_16: SWGFGIFOXT2SOL3M · pith_short_8: SWGFGIFO

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/SWGFGIFOXT2SOL3MQO4TSVJXHG \
  | 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: 958c5320aebcf5272f6c83b939553739942d17dba5f056f51277b6e083a1609f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72377b329abe773df28fbee82d83f84e2f62ecc94da7c19f063e0d2ee5b1f22d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SP",
    "submitted_at": "2015-02-16T15:10:15Z",
    "title_canon_sha256": "a876b8cdf0a9ff09b6891726164c3b8a33efb0d789668b47091e623fead2c10f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.04566",
    "kind": "arxiv",
    "version": 8
  }
}