Pith Number

pith:X252PWKZ

pith:2025:X252PWKZ4SWJHAE7EMJDBF4ERJ

not attested not anchored not stored refs pending

Universal Methods for Nonlinear Spectral Problems

Catherine Drysdale, Matthew J. Colbrook

arxiv:2504.17012 v1 · 2025-04-23 · math.NA · cs.NA · math.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X252PWKZ4SWJHAE7EMJDBF4ERJ}

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	2026-07-05T10:53:20.585637Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bebba7d959e4ac93809f23123097848a608d970a3907dced90c31a69b8793781

Aliases

arxiv: 2504.17012 · arxiv_version: 2504.17012v1 · doi: 10.48550/arxiv.2504.17012 · pith_short_12: X252PWKZ4SWJ · pith_short_16: X252PWKZ4SWJHAE7 · pith_short_8: X252PWKZ

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/X252PWKZ4SWJHAE7EMJDBF4ERJ \
  | 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: bebba7d959e4ac93809f23123097848a608d970a3907dced90c31a69b8793781

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84d6988b0aa842fc652bb31319dabb028223f1d14dab6c05cbf382aeb2f228d9",
    "cross_cats_sorted": [
      "cs.NA",
      "math.SP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2025-04-23T18:01:06Z",
    "title_canon_sha256": "3b822d9f657aa5a7146fad5eec9a851385fb76a06753108578bd14317bdfc97f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.17012",
    "kind": "arxiv",
    "version": 1
  }
}