Pith Number

pith:EU3TBWUJ

pith:2021:EU3TBWUJPCLSX4FEBIKZSVG52D

not attested not anchored not stored refs pending

QPPAL: A two-phase proximal augmented Lagrangian method for high dimensional convex quadratic programming problems

Defeng Sun, Kim-Chuan Toh, Ling Liang, Xudong Li

arxiv:2103.13108 v3 · 2021-03-24 · 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{EU3TBWUJPCLSX4FEBIKZSVG52D}

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	2026-07-05T03:52:12.374415Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

253730da8978972bf0a40a159954ddd0d2adbd1208c93cd966e694ee10514229

Aliases

arxiv: 2103.13108 · arxiv_version: 2103.13108v3 · doi: 10.48550/arxiv.2103.13108 · pith_short_12: EU3TBWUJPCLS · pith_short_16: EU3TBWUJPCLSX4FE · pith_short_8: EU3TBWUJ

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/EU3TBWUJPCLSX4FEBIKZSVG52D \
  | 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: 253730da8978972bf0a40a159954ddd0d2adbd1208c93cd966e694ee10514229

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5141e33ce99a58e3d470734f8b6c2c7a2890d15c82b22b0e379063553862397",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2021-03-24T11:30:36Z",
    "title_canon_sha256": "1a68f2d04be364011b05ef1b7c022012525ed7ee224f1dcab46cae92acc1dac7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.13108",
    "kind": "arxiv",
    "version": 3
  }
}