Pith Number

pith:IXZ46ZA2

pith:2013:IXZ46ZA2E4HLPXPU47EGCDDPY2

not attested not anchored not stored refs pending

Projection Methods: Swiss Army Knives for Solving Feasibility and Best Approximation Problems with Halfspaces

Heinz H. Bauschke, Valentin R. Koch

arxiv:1301.4506 v1 · 2013-01-18 · math.OC · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IXZ46ZA2E4HLPXPU47EGCDDPY2}

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	2026-05-18T03:36:03.714068Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45f3cf641a270eb7ddf4e7c8610c6fc6957ccdc7b6a33d8037ba50d437c93754

Aliases

arxiv: 1301.4506 · arxiv_version: 1301.4506v1 · doi: 10.48550/arxiv.1301.4506 · pith_short_12: IXZ46ZA2E4HL · pith_short_16: IXZ46ZA2E4HLPXPU · pith_short_8: IXZ46ZA2

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/IXZ46ZA2E4HLPXPU47EGCDDPY2 \
  | 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: 45f3cf641a270eb7ddf4e7c8610c6fc6957ccdc7b6a33d8037ba50d437c93754

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d25edd751384e37c2c68bd850f8cdf8d0e99feecab5e03f1e2578f96383f2e6c",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-01-18T21:11:23Z",
    "title_canon_sha256": "4f97c567edb13f110c6f29e482b0d58937cf7d2a90f2a65a61eb55ace2616c74"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.4506",
    "kind": "arxiv",
    "version": 1
  }
}