Pith Number

pith:OSPRQHFO

pith:2025:OSPRQHFOD3CBQONNTLFEKPFFGY

not attested not anchored not stored refs pending

Operator Inference for Elliptic Eigenvalue Problems

Haoqian Li, Jiguang Sun, Zhiwen Zhang

arxiv:2504.15733 v1 · 2025-04-22 · math.NA · 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{OSPRQHFOD3CBQONNTLFEKPFFGY}

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	2026-07-05T10:52:29.175950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

749f181cae1ec41839ad9aca453ca5360558419e46c791c07b9e5d628458bf2a

Aliases

arxiv: 2504.15733 · arxiv_version: 2504.15733v1 · doi: 10.48550/arxiv.2504.15733 · pith_short_12: OSPRQHFOD3CB · pith_short_16: OSPRQHFOD3CBQONN · pith_short_8: OSPRQHFO

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/OSPRQHFOD3CBQONNTLFEKPFFGY \
  | 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: 749f181cae1ec41839ad9aca453ca5360558419e46c791c07b9e5d628458bf2a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d00c4168c165443b3ad8b852610fcb905bfbafd706cac17fc50e986bccd1f6a0",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2025-04-22T09:25:36Z",
    "title_canon_sha256": "b64451b4b470427fef711244d373358c12f310f51050709f4f441fba1476a7c8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.15733",
    "kind": "arxiv",
    "version": 1
  }
}