Pith Number

pith:VFZX6CAY

pith:2014:VFZX6CAYR3IATTYWOIWTYGKHIW

not attested not anchored not stored refs pending

Positivity of Partitioned Hermitian Matrices with Unitarily Invariant Norms

Chi-Kwong Li, Fuzhen Zhang

arxiv:1407.0331 v3 · 2014-06-29 · math.RA · 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{VFZX6CAYR3IATTYWOIWTYGKHIW}

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	2026-05-18T02:44:39.675797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9737f08188ed009cf16722d3c194745bca7143b3917ea82a2367e5491be11b2

Aliases

arxiv: 1407.0331 · arxiv_version: 1407.0331v3 · doi: 10.48550/arxiv.1407.0331 · pith_short_12: VFZX6CAYR3IA · pith_short_16: VFZX6CAYR3IATTYW · pith_short_8: VFZX6CAY

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/VFZX6CAYR3IATTYWOIWTYGKHIW \
  | 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: a9737f08188ed009cf16722d3c194745bca7143b3917ea82a2367e5491be11b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "026d873ae600cdd374eae7dd66a3b0f2865ce9508100262c0588fc2d63b5a58a",
    "cross_cats_sorted": [
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2014-06-29T06:29:45Z",
    "title_canon_sha256": "e0f8884147b6e6f2b85ad744feced940251ee336f776a8ab317d25f9f982f6a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.0331",
    "kind": "arxiv",
    "version": 3
  }
}