Pith Number

pith:I3A2LZAW

pith:2017:I3A2LZAWZH7PMKYXJAAMFMVCXL

not attested not anchored not stored refs pending

Non-Linear Least-Squares Optimization of Rational Filters for the Solution of Interior Eigenvalue Problems

2) ((1) AICES, (2) JSC, Edoardo Di Napoli (1, Forschungszentrum J\"ulich), Jan Winkelmann (1), RWTH Aachen University

arxiv:1704.03255 v2 · 2017-04-11 · cs.CE · cs.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{I3A2LZAWZH7PMKYXJAAMFMVCXL}

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	2026-05-18T00:45:25.553392Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46c1a5e416c9fef62b174800c2b2a2bac943c9ccb379043d2b1a18fbca915e0a

Aliases

arxiv: 1704.03255 · arxiv_version: 1704.03255v2 · doi: 10.48550/arxiv.1704.03255 · pith_short_12: I3A2LZAWZH7P · pith_short_16: I3A2LZAWZH7PMKYX · pith_short_8: I3A2LZAW

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/I3A2LZAWZH7PMKYXJAAMFMVCXL \
  | 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: 46c1a5e416c9fef62b174800c2b2a2bac943c9ccb379043d2b1a18fbca915e0a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14e647e4cc576825315c5fcab388399a813551939860f042cda57a6c3f5ade0c",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2017-04-11T12:02:21Z",
    "title_canon_sha256": "0f9baeb002a25a2a4a30841213bcd8f7b3ab95a150351b07abd09857d5d676a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.03255",
    "kind": "arxiv",
    "version": 2
  }
}