Pith Number

pith:QAOQDNVZ

pith:2008:QAOQDNVZKUPTAUPUXS45AD2TU7

not attested not anchored not stored refs pending

Low-rank optimization for semidefinite convex problems

F. Bach, M. Journ\'ee, P.-A. Absil, R. Sepulchre

arxiv:0807.4423 v1 · 2008-07-28 · 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{QAOQDNVZKUPTAUPUXS45AD2TU7}

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	2026-05-18T04:41:54.955456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

801d01b6b9551f3051f4bcb9d00f53a7eb8da1433631b78cae30dd511c7cc704

Aliases

arxiv: 0807.4423 · arxiv_version: 0807.4423v1 · doi: 10.48550/arxiv.0807.4423 · pith_short_12: QAOQDNVZKUPT · pith_short_16: QAOQDNVZKUPTAUPU · pith_short_8: QAOQDNVZ

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/QAOQDNVZKUPTAUPUXS45AD2TU7 \
  | 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: 801d01b6b9551f3051f4bcb9d00f53a7eb8da1433631b78cae30dd511c7cc704

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df008cece01f9cd58aacf707dcfc5fc72e5cf8c17cac0e370cc517ae472f2d03",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2008-07-28T12:05:30Z",
    "title_canon_sha256": "ed851877aaf4d2d130b906e18c1ae164fea246e4ccf3fecda0263aa9083c4e92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.4423",
    "kind": "arxiv",
    "version": 1
  }
}