Pith Number

pith:TLWMXFZG

pith:2023:TLWMXFZG64DGB6HAIPC2GD4ANS

not attested not anchored not stored refs pending

Real Factorization of Positive Semidefinite Matrix Polynomials

Hugo J. Woerdeman, Sarah Gift

arxiv:2301.13776 v2 · 2023-01-31 · math.OC · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TLWMXFZG64DGB6HAIPC2GD4ANS}

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	2026-07-05T06:44:29.471408Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9aeccb9726f70660f8e043c5a30f806c94b769ff92c794650ca50ff18c3f84b2

Aliases

arxiv: 2301.13776 · arxiv_version: 2301.13776v2 · doi: 10.48550/arxiv.2301.13776 · pith_short_12: TLWMXFZG64DG · pith_short_16: TLWMXFZG64DGB6HA · pith_short_8: TLWMXFZG

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/TLWMXFZG64DGB6HAIPC2GD4ANS \
  | 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: 9aeccb9726f70660f8e043c5a30f806c94b769ff92c794650ca50ff18c3f84b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad6997331783b4bfd2b83a04fe610a207cea1d83d520322b895f04bb427e8daf",
    "cross_cats_sorted": [
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2023-01-31T17:24:46Z",
    "title_canon_sha256": "339b549dbf0fcd2933017c34bca1d1bcc6139bfc34a5a653ff05f097be6b275b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2301.13776",
    "kind": "arxiv",
    "version": 2
  }
}