Pith Number

pith:NBBEWY7L

pith:2019:NBBEWY7LXW3IH7JHA3N3O3XEC4

not attested not anchored not stored refs pending

Parametric Convex Quadratic Relaxation of the Quadratic Knapsac Problem

Daniela Cristina Lubke, Fei Wang, Henry Wolkowicz, Marcia Fampa

arxiv:1901.06714 v2 · 2019-01-20 · 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{NBBEWY7LXW3IH7JHA3N3O3XEC4}

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	2026-05-17T23:43:50.083976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68424b63ebbdb683fd2706dbb76ee4171e77a20ee6492a5958d1e4b3b3ac63fc

Aliases

arxiv: 1901.06714 · arxiv_version: 1901.06714v2 · doi: 10.48550/arxiv.1901.06714 · pith_short_12: NBBEWY7LXW3I · pith_short_16: NBBEWY7LXW3IH7JH · pith_short_8: NBBEWY7L

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/NBBEWY7LXW3IH7JHA3N3O3XEC4 \
  | 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: 68424b63ebbdb683fd2706dbb76ee4171e77a20ee6492a5958d1e4b3b3ac63fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5df43f6abe30df9c2c287f7c3913732906e57411b484878c634b01ddedc0efd2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-01-20T19:06:34Z",
    "title_canon_sha256": "9b9a592809d04217b9cd7bc10798b9542f11ae84ff401c404019b20230a24680"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.06714",
    "kind": "arxiv",
    "version": 2
  }
}