Pith Number

pith:FKA2T5EN

pith:2023:FKA2T5ENAXEAEFKR4J3WKFPGUV

not attested not anchored not stored refs pending

A Preconditioned Riemannian Gradient Descent Algorithm for Low-Rank Matrix Recovery

Fengmiao Bian, Jian-Feng Cai, Rui Zhang

arxiv:2305.02543 v1 · 2023-05-04 · 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{FKA2T5ENAXEAEFKR4J3WKFPGUV}

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	2026-07-05T06:07:02.251254Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a81a9f48d05c8021551e2776515e6a564554ced749d8f2a3adecd33cd4c83c6

Aliases

arxiv: 2305.02543 · arxiv_version: 2305.02543v1 · doi: 10.48550/arxiv.2305.02543 · pith_short_12: FKA2T5ENAXEA · pith_short_16: FKA2T5ENAXEAEFKR · pith_short_8: FKA2T5EN

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/FKA2T5ENAXEAEFKR4J3WKFPGUV \
  | 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: 2a81a9f48d05c8021551e2776515e6a564554ced749d8f2a3adecd33cd4c83c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8c6f6151e181f1929f13d80d75995da5435516e0ab508aefa3d98f8faa26a96",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2023-05-04T04:41:25Z",
    "title_canon_sha256": "e80cce7ec8db5e5ef5e6ca68b042cc3acc635eacedc67f26d68f35898ef62272"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2305.02543",
    "kind": "arxiv",
    "version": 1
  }
}