Pith Number

pith:D45JY27P

pith:2021:D45JY27PODKMGQSIEZ2WRFZ52O

not attested not anchored not stored refs pending

An adaptive finite element method for high-frequency scattering problems with smoothly varying coefficients

Anton Arnold, Dmitry Ponomarev, Ilaria Perugia, Sjoerd Geevers

arxiv:2103.02511 v2 · 2021-03-03 · 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{D45JY27PODKMGQSIEZ2WRFZ52O}

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	2026-07-05T03:48:05.405096Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f3a9c6bef70d4c34248267568973dd39a783cb991a27598adc2c34e53a8baf0

Aliases

arxiv: 2103.02511 · arxiv_version: 2103.02511v2 · doi: 10.48550/arxiv.2103.02511 · pith_short_12: D45JY27PODKM · pith_short_16: D45JY27PODKMGQSI · pith_short_8: D45JY27P

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/D45JY27PODKMGQSIEZ2WRFZ52O \
  | 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: 1f3a9c6bef70d4c34248267568973dd39a783cb991a27598adc2c34e53a8baf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "85bd1c86980191c3ecf3b72b3e9aae1b012707580bf3063720f495baf6ed34a4",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-03-03T16:32:19Z",
    "title_canon_sha256": "83efea4bf483f339ffcd170c38d4a3eabf37686ec5d9885e53a261b063fd71f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.02511",
    "kind": "arxiv",
    "version": 2
  }
}