Pith Number

pith:55EN3JIW

pith:2018:55EN3JIWJWGFIRNWJBW6LKQEM3

not attested not anchored not stored refs pending

Minimizing convex quadratic with variable precision conjugate gradients

D. Titley-Peloquin, E. Simon, Ph. L. Toint, S. Gratton

arxiv:1807.07476 v3 · 2018-07-17 · math.NA · cs.NA · 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{55EN3JIWJWGFIRNWJBW6LKQEM3}

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	2026-06-04T19:12:08.332156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef48dda5164d8c5445b6486de5aa0466d0806931752339884c2a050abe50d6b0

Aliases

arxiv: 1807.07476 · arxiv_version: 1807.07476v3 · doi: 10.48550/arxiv.1807.07476 · pith_short_12: 55EN3JIWJWGF · pith_short_16: 55EN3JIWJWGFIRNW · pith_short_8: 55EN3JIW

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/55EN3JIWJWGFIRNWJBW6LKQEM3 \
  | 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: ef48dda5164d8c5445b6486de5aa0466d0806931752339884c2a050abe50d6b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a4fc6952ce3bca0757eb06b1e198c0e1e738c804b20753757c45ced6928c7fa",
    "cross_cats_sorted": [
      "cs.NA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-17T14:10:15Z",
    "title_canon_sha256": "3174a7147a33cd10bbecead626463e3d373840108cf3cb48b16e9347553cb910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.07476",
    "kind": "arxiv",
    "version": 3
  }
}