Pith Number

pith:SK42KGPT

pith:2018:SK42KGPTIHEQT3Z6P7L6NGBTOT

not attested not anchored not stored refs pending

A nonconforming Trefftz virtual element method for the Helmholtz problem: numerical aspects

A. Pichler, I. Perugia, L. Mascotto

arxiv:1807.11237 v1 · 2018-07-30 · 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{SK42KGPTIHEQT3Z6P7L6NGBTOT}

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	2026-05-17T23:53:42.257445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92b9a519f341c909ef3e7fd7e6983374dc2608163a64749bee3446ffd022a7e2

Aliases

arxiv: 1807.11237 · arxiv_version: 1807.11237v1 · doi: 10.48550/arxiv.1807.11237 · pith_short_12: SK42KGPTIHEQ · pith_short_16: SK42KGPTIHEQT3Z6 · pith_short_8: SK42KGPT

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/SK42KGPTIHEQT3Z6P7L6NGBTOT \
  | 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: 92b9a519f341c909ef3e7fd7e6983374dc2608163a64749bee3446ffd022a7e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0d58aa3b64096d43ed16dc883d705e26333c0868ae0451a3eda1e680fe25f99",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-30T08:52:58Z",
    "title_canon_sha256": "b95bfb92f71003b7db46aefd86ee766b3a1c88dc437f28566f6bdbaee55a29f8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.11237",
    "kind": "arxiv",
    "version": 1
  }
}