Pith Number

pith:NOAY2WZB

pith:2014:NOAY2WZB72YRPMJJTIDJUQIMML

not attested not anchored not stored refs pending

Inverse boundary value problem for the Helmholtz equation: Multi-level approach and iterative reconstruction

Elena Beretta, Lingyun Qiu, Maarten V. de Hoop, Otmar Scherzer

arxiv:1406.2391 v1 · 2014-06-10 · math.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{NOAY2WZB72YRPMJJTIDJUQIMML}

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	2026-05-18T02:50:01.803585Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b818d5b21feb117b1299a069a410c62c2c09d67a8441825b4d94746d2b2c243

Aliases

arxiv: 1406.2391 · arxiv_version: 1406.2391v1 · doi: 10.48550/arxiv.1406.2391 · pith_short_12: NOAY2WZB72YR · pith_short_16: NOAY2WZB72YRPMJJ · pith_short_8: NOAY2WZB

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/NOAY2WZB72YRPMJJTIDJUQIMML \
  | 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: 6b818d5b21feb117b1299a069a410c62c2c09d67a8441825b4d94746d2b2c243

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb401f03576bf1162a5462d326aedcb6131638281c9cfc4474a79882e3515ae4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-06-10T00:26:55Z",
    "title_canon_sha256": "ae836670dfa4c02c8968d228acaeffccaa267f209f89144af7b9645d2bd0bf79"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.2391",
    "kind": "arxiv",
    "version": 1
  }
}