Pith Number

pith:IALZLWCF

pith:2025:IALZLWCFAE7MKDLPEF2CEJT6SO

not attested not anchored not stored refs pending

Tax reform as a constrained optimization problem: a piecewise-linear framework and software implementation

Mark Verhagen, Menno Schellekens, Michael Garstka

arxiv:2508.03708 v4 · 2025-07-21 · q-fin.GN · cs.SY · econ.GN · eess.SY · q-fin.EC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IALZLWCFAE7MKDLPEF2CEJT6SO}

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	2026-07-20T01:18:18.596816Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

401795d845013ec50d6f217422267e93b380859737e136270b759114269ab05c

Aliases

arxiv: 2508.03708 · arxiv_version: 2508.03708v4 · doi: 10.48550/arxiv.2508.03708 · pith_short_12: IALZLWCFAE7M · pith_short_16: IALZLWCFAE7MKDLP · pith_short_8: IALZLWCF

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/IALZLWCFAE7MKDLPEF2CEJT6SO \
  | 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: 401795d845013ec50d6f217422267e93b380859737e136270b759114269ab05c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8095f980a3fce8c95bb73f1cef43aeedda1be35902ec4a68b57640fdbc7cbb04",
    "cross_cats_sorted": [
      "cs.SY",
      "econ.GN",
      "eess.SY",
      "q-fin.EC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "q-fin.GN",
    "submitted_at": "2025-07-21T18:29:45Z",
    "title_canon_sha256": "e3e6d9d89ccb5267449c185731f43beb3784123ef70b70d71922b2723f36629f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.03708",
    "kind": "arxiv",
    "version": 4
  }
}