Pith Number

pith:QYB4GBEV

pith:2016:QYB4GBEVFF3FIIFK3KZZJH3Q6G

not attested not anchored not stored refs pending

Gradient Projection Iterative Sketch for Large-Scale Constrained Least-Squares

Junqi Tang, Mike Davies, Mohammad Golbabaee

arxiv:1609.09419 v4 · 2016-09-29 · 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{QYB4GBEVFF3FIIFK3KZZJH3Q6G}

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	2026-05-18T00:40:13.712493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8603c3049529765420aadab3949f70f191746425b4c9b23f5cdace9eb5fb0a6e

Aliases

arxiv: 1609.09419 · arxiv_version: 1609.09419v4 · doi: 10.48550/arxiv.1609.09419 · pith_short_12: QYB4GBEVFF3F · pith_short_16: QYB4GBEVFF3FIIFK · pith_short_8: QYB4GBEV

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/QYB4GBEVFF3FIIFK3KZZJH3Q6G \
  | 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: 8603c3049529765420aadab3949f70f191746425b4c9b23f5cdace9eb5fb0a6e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f850486f161945de5aa3509853a082ceba9b65aea0911ef27efbc9d77001d632",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-09-29T16:37:45Z",
    "title_canon_sha256": "c228e7c8c10453077bfe2d84cefafd66724332e95f9bdfdbc02ec83bfe3a1837"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.09419",
    "kind": "arxiv",
    "version": 4
  }
}