Pith Number

pith:4I2KKCM7

pith:2016:4I2KKCM7Y75RCNPHWZPOQVREIV

not attested not anchored not stored refs pending

Semidefinite representations of gauge functions for structured low-rank matrix decomposition

Hsiao-Han Chao, Lieven Vandenberghe

arxiv:1604.02500 v1 · 2016-04-08 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4I2KKCM7Y75RCNPHWZPOQVREIV}

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	2026-05-18T01:17:22.772541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e234a5099fc7fb1135e7b65ee8562445667325b31b9ee8f158e13c19793e546c

Aliases

arxiv: 1604.02500 · arxiv_version: 1604.02500v1 · doi: 10.48550/arxiv.1604.02500 · pith_short_12: 4I2KKCM7Y75R · pith_short_16: 4I2KKCM7Y75RCNPH · pith_short_8: 4I2KKCM7

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/4I2KKCM7Y75RCNPHWZPOQVREIV \
  | 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: e234a5099fc7fb1135e7b65ee8562445667325b31b9ee8f158e13c19793e546c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a67d31e7b66af1a8a0b7d207bf1f3d8a670eee3b45994fabbbf5fec7f9a2625",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-04-08T23:04:57Z",
    "title_canon_sha256": "fa9c947b4982c1261853fcd723a59c8f1fa115535341b19731948f3edfc46b96"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.02500",
    "kind": "arxiv",
    "version": 1
  }
}