Pith Number

pith:2W2OS7CH

pith:2018:2W2OS7CHZNFMBKJ2XNINNGWNE5

not attested not anchored not stored refs pending

Particle-without-Particle: a practical pseudospectral collocation method for linear partial differential equations with distributional sources

Alessandro D.A.M. Spallicci, Carlos F. Sopuerta, Marius Oltean

arxiv:1802.03405 v2 · 2018-02-09 · physics.comp-ph · cs.NA · gr-qc · math.NA · q-bio.NC · q-fin.CP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2W2OS7CHZNFMBKJ2XNINNGWNE5}

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	2026-06-04T19:11:29.871572Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5b4e97c47cb4ac0a93abb50d69acd274e975d641354be27bf6639ac977961fc

Aliases

arxiv: 1802.03405 · arxiv_version: 1802.03405v2 · doi: 10.48550/arxiv.1802.03405 · pith_short_12: 2W2OS7CHZNFM · pith_short_16: 2W2OS7CHZNFMBKJ2 · pith_short_8: 2W2OS7CH

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/2W2OS7CHZNFMBKJ2XNINNGWNE5 \
  | 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: d5b4e97c47cb4ac0a93abb50d69acd274e975d641354be27bf6639ac977961fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fea9f97610828a9d20c8e7ea4f0005c5c02391719f5ddff6d9cdfcc30b6762b4",
    "cross_cats_sorted": [
      "cs.NA",
      "gr-qc",
      "math.NA",
      "q-bio.NC",
      "q-fin.CP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.comp-ph",
    "submitted_at": "2018-02-09T19:00:05Z",
    "title_canon_sha256": "8c6b5d6e5e28f6f79e5ce2c7f704479ff6b81a23d1071b551d168e78887e81a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03405",
    "kind": "arxiv",
    "version": 2
  }
}