Pith Number

pith:FQQ2ZEHM

pith:2018:FQQ2ZEHMPSHRRQEM7HV4BYVEQ4

not attested not anchored not stored refs pending

Linear Convergence of the Primal-Dual Gradient Method for Convex-Concave Saddle Point Problems without Strong Convexity

Simon S. Du, Wei Hu

arxiv:1802.01504 v2 · 2018-02-05 · math.OC · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FQQ2ZEHMPSHRRQEM7HV4BYVEQ4}

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	2026-05-17T23:54:54.572159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c21ac90ec7c8f18c08cf9ebc0e2a4872f7f2cd1b4f2c3bb0fee54f160f936ee

Aliases

arxiv: 1802.01504 · arxiv_version: 1802.01504v2 · doi: 10.48550/arxiv.1802.01504 · pith_short_12: FQQ2ZEHMPSHR · pith_short_16: FQQ2ZEHMPSHRRQEM · pith_short_8: FQQ2ZEHM

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/FQQ2ZEHMPSHRRQEM7HV4BYVEQ4 \
  | 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: 2c21ac90ec7c8f18c08cf9ebc0e2a4872f7f2cd1b4f2c3bb0fee54f160f936ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "007e594d54429b4db75114a1e99aea89e4addcaa67d5e231511013b65e6537b9",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-02-05T16:27:06Z",
    "title_canon_sha256": "92787c2c569f4e52f2a757c3424927bf4bc96e6cca4ab86b8be25bab97f01956"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.01504",
    "kind": "arxiv",
    "version": 2
  }
}