Pith Number

pith:W7T7GATO

pith:2018:W7T7GATOZVAGUQWBH2KCMBMA5F

not attested not anchored not stored refs pending

Fourth order finite difference methods for the wave equation with mesh refinement interfaces

N. Anders Petersson, Siyang Wang

arxiv:1809.04310 v3 · 2018-09-12 · 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{W7T7GATOZVAGUQWBH2KCMBMA5F}

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	2026-05-17T23:39:41.684093Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7e7f3026ecd406a42c13e94260580e96f94192373c52f53c11973895a19e8b8

Aliases

arxiv: 1809.04310 · arxiv_version: 1809.04310v3 · doi: 10.48550/arxiv.1809.04310 · pith_short_12: W7T7GATOZVAG · pith_short_16: W7T7GATOZVAGUQWB · pith_short_8: W7T7GATO

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/W7T7GATOZVAGUQWBH2KCMBMA5F \
  | 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: b7e7f3026ecd406a42c13e94260580e96f94192373c52f53c11973895a19e8b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "def9ed33e27bd20bda1ca1ae12406f66f4c995617a93b8ca06afa760e86e70e6",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-09-12T08:47:16Z",
    "title_canon_sha256": "5dddf6797ae75d58e9b59ca680e43f1c8491acae7b54cff4606293783a69881c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.04310",
    "kind": "arxiv",
    "version": 3
  }
}