Pith Number

pith:BCH4TL5S

pith:2025:BCH4TL5S57NUY5Z2GN47MS5MX2

not attested not anchored not stored refs pending

Nonnegative Biquadratic Tensors

Chunfeng Cui, Liqun Qi

arxiv:2503.16176 v2 · 2025-03-20 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BCH4TL5S57NUY5Z2GN47MS5MX2}

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.

Cited by

1 paper in Pith

Postive Semidefinite and Sum of Squares Biquadratic Polynomials

Receipt and verification

First computed	2026-07-05T10:40:18.431640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

088fc9afb2efdb4c773a3379f64bacbe94c7c9e9b5bcbdfb901fdd98e1bbbe2b

Aliases

arxiv: 2503.16176 · arxiv_version: 2503.16176v2 · doi: 10.48550/arxiv.2503.16176 · pith_short_12: BCH4TL5S57NU · pith_short_16: BCH4TL5S57NUY5Z2 · pith_short_8: BCH4TL5S

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/BCH4TL5S57NUY5Z2GN47MS5MX2 \
  | 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: 088fc9afb2efdb4c773a3379f64bacbe94c7c9e9b5bcbdfb901fdd98e1bbbe2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7193788bb1ea6e4c930d5129aed7d55cb241cc6ec8d3823df58cdb11917c2315",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2025-03-20T14:18:11Z",
    "title_canon_sha256": "8319696ae62515df4e76ec4ad034d2d3cce27ca426420d10801ddb501a2d72bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2503.16176",
    "kind": "arxiv",
    "version": 2
  }
}