Pith Number

pith:EPRRY4TI

pith:2013:EPRRY4TIWU3WNEO4MH5NI2VNUC

not attested not anchored not stored refs pending

Updating constraint preconditioners for KKT systems in quadratic programming via low-rank corrections

B. Morini, D. Di Serafino, S. Bellavia, V. De Simone

arxiv:1312.0047 v3 · 2013-11-30 · math.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{EPRRY4TIWU3WNEO4MH5NI2VNUC}

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	2026-05-18T01:32:41.995844Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23e31c7268b5376691dc61fad46aada08be6dbdc868aafaa57c68674677b7350

Aliases

arxiv: 1312.0047 · arxiv_version: 1312.0047v3 · doi: 10.48550/arxiv.1312.0047 · pith_short_12: EPRRY4TIWU3W · pith_short_16: EPRRY4TIWU3WNEO4 · pith_short_8: EPRRY4TI

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/EPRRY4TIWU3WNEO4MH5NI2VNUC \
  | 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: 23e31c7268b5376691dc61fad46aada08be6dbdc868aafaa57c68674677b7350

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8bb83054ee78258f9ec9dbfeaf7801cb8d0cb890528cd16d2324821c7826ac6d",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-11-30T00:42:30Z",
    "title_canon_sha256": "f96bbf6f99853f51e671afc816951e8a744007a746d72f2fcd654cea8a3d360f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.0047",
    "kind": "arxiv",
    "version": 3
  }
}