Pith Number

pith:J47STEB2

pith:2012:J47STEB2OJSO6R73J5BDBYQ7AC

not attested not anchored not stored refs pending

Complexity of the positive semidefinite matrix completion problem with a rank constraint

Antonios Varvitsiotis, Marianna Eisenberg-Nagy, Monique Laurent

arxiv:1203.6602 v2 · 2012-03-29 · 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{J47STEB2OJSO6R73J5BDBYQ7AC}

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	2026-05-18T03:45:22.974748Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f3f29903a7264ef47fb4f4230e21f00a74647c726bef5dce959b960ed2b9f2f

Aliases

arxiv: 1203.6602 · arxiv_version: 1203.6602v2 · doi: 10.48550/arxiv.1203.6602 · pith_short_12: J47STEB2OJSO · pith_short_16: J47STEB2OJSO6R73 · pith_short_8: J47STEB2

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/J47STEB2OJSO6R73J5BDBYQ7AC \
  | 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: 4f3f29903a7264ef47fb4f4230e21f00a74647c726bef5dce959b960ed2b9f2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8517ef53f16fdd9ceca446db04db65fe944fbadc3b6a2f7be102727a6173c299",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-03-29T17:40:17Z",
    "title_canon_sha256": "d9abbf82982f3a36fc5a556ba159be4250d9fb37996ca50d43fa3091169dacb2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.6602",
    "kind": "arxiv",
    "version": 2
  }
}