Pith Number

pith:BATRXVVQ

pith:2020:BATRXVVQWIQSTHZDI3MLVR4MSP

not attested not anchored not stored refs pending

Approximating Sparse Quadratic Programs

Danny Hermelin, Leon Kellerhals, Rami Pugatch, Rolf Niedermeier

arxiv:2007.01252 v4 · 2020-07-02 · cs.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BATRXVVQWIQSTHZDI3MLVR4MSP}

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	2026-07-05T01:59:30.859513Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08271bd6b0b221299f2346d8bac78c93ddacd6fa29bbc78897bcbf8f8a18e016

Aliases

arxiv: 2007.01252 · arxiv_version: 2007.01252v4 · doi: 10.48550/arxiv.2007.01252 · pith_short_12: BATRXVVQWIQS · pith_short_16: BATRXVVQWIQSTHZD · pith_short_8: BATRXVVQ

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/BATRXVVQWIQSTHZDI3MLVR4MSP \
  | 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: 08271bd6b0b221299f2346d8bac78c93ddacd6fa29bbc78897bcbf8f8a18e016

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f706fcfb756073a4c41b74d43aeb70e3dc2b8a99d1c802121d28413ad8446c60",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2020-07-02T17:02:04Z",
    "title_canon_sha256": "091510bfa39531e5edc08d7d25cdd8ef9be3205155065bc41b1c2b396c0b08b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.01252",
    "kind": "arxiv",
    "version": 4
  }
}