Pith Number

pith:Q3C2Z4IP

pith:2024:Q3C2Z4IPD6I6RPNZHEQEJWJPKI

not attested not anchored not stored refs pending

Lagrangian operator inference enhanced with structure-preserving machine learning for nonintrusive model reduction of mechanical systems

Boris Kramer, David A. Najera-Flores, Harsh Sharma, Michael D. Todd

arxiv:2404.05040 v1 · 2024-04-07 · cs.CE · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q3C2Z4IPD6I6RPNZHEQEJWJPKI}

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	2026-07-05T08:05:25.282941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86c5acf10f1f91e8bdb9392044d92f5238e45bcb5c1d4b1cfc972bc902240c41

Aliases

arxiv: 2404.05040 · arxiv_version: 2404.05040v1 · doi: 10.48550/arxiv.2404.05040 · pith_short_12: Q3C2Z4IPD6I6 · pith_short_16: Q3C2Z4IPD6I6RPNZ · pith_short_8: Q3C2Z4IP

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/Q3C2Z4IPD6I6RPNZHEQEJWJPKI \
  | 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: 86c5acf10f1f91e8bdb9392044d92f5238e45bcb5c1d4b1cfc972bc902240c41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae4e7e3e0e5742efff0e320e15cfa5a993e35083e3f087355932342fdc5b0d45",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2024-04-07T18:52:10Z",
    "title_canon_sha256": "cfa596c05386ba52393797655b48024635194b884ef539677517754137a5a957"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2404.05040",
    "kind": "arxiv",
    "version": 1
  }
}