Pith Number

pith:PPWSMLG5

pith:2025:PPWSMLG5LTDGKDDAKTNNMQGKF7

not attested not anchored not stored refs pending

Introduction to inverse problems for non-linear partial differential equations

Matti Lassas

arxiv:2503.12448 v1 · 2025-03-16 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PPWSMLG5LTDGKDDAKTNNMQGKF7}

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	2026-07-05T10:32:13.428029Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bed262cdd5cc6650c6054dad640ca2fc14122681b770f9626727429348721c9

Aliases

arxiv: 2503.12448 · arxiv_version: 2503.12448v1 · doi: 10.48550/arxiv.2503.12448 · pith_short_12: PPWSMLG5LTDG · pith_short_16: PPWSMLG5LTDGKDDA · pith_short_8: PPWSMLG5

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/PPWSMLG5LTDGKDDAKTNNMQGKF7 \
  | 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: 7bed262cdd5cc6650c6054dad640ca2fc14122681b770f9626727429348721c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96782d368cfb0e397d75fb01aefdaa06a4de0aa3e5a88c98b1527cb087d68684",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2025-03-16T10:44:43Z",
    "title_canon_sha256": "132feb1876ce46300ea263809554a4a8f7b5a7f2eeb2f83140164bc94e4e3d49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2503.12448",
    "kind": "arxiv",
    "version": 1
  }
}