Pith Number

pith:VJBX2EPQ

pith:2022:VJBX2EPQJTLQZYVZ7VY5HJPYEY

not attested not anchored not stored refs pending

Structured Gradient Descent for Fast Robust Low-Rank Hankel Matrix Completion

HanQin Cai, Jian-Feng Cai, Juntao You

arxiv:2204.03316 v4 · 2022-04-07 · cs.IT · math.IT · 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{VJBX2EPQJTLQZYVZ7VY5HJPYEY}

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	2026-07-05T10:49:41.885109Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa437d11f04cd70ce2b9fd71d3a5f8263cc3b1efa927db56ae46eda4a15ffda9

Aliases

arxiv: 2204.03316 · arxiv_version: 2204.03316v4 · doi: 10.48550/arxiv.2204.03316 · pith_short_12: VJBX2EPQJTLQ · pith_short_16: VJBX2EPQJTLQZYVZ · pith_short_8: VJBX2EPQ

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/VJBX2EPQJTLQZYVZ7VY5HJPYEY \
  | 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: aa437d11f04cd70ce2b9fd71d3a5f8263cc3b1efa927db56ae46eda4a15ffda9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c7635bfd220f69ff4a6553a026f37ad75ef48f23a29d5f62ff4e609baeda921",
    "cross_cats_sorted": [
      "math.IT",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2022-04-07T09:26:43Z",
    "title_canon_sha256": "3648ea5ebdf102a773a97b2784167a023af5a227c494d1a11618cc2b512da451"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.03316",
    "kind": "arxiv",
    "version": 4
  }
}