Pith Number

pith:CBDWS2JT

pith:2025:CBDWS2JTVWYY5W2ZGHCY6WXQU5

not attested not anchored not stored refs pending

A Nonstandard Finite Difference Scheme for an SEIQR Epidemiological PDE Model

Achraf Zinihi, Matthias Ehrhardt, Moulay Rchid Sidi Ammi

arxiv:2508.02928 v3 · 2025-08-04 · q-bio.QM · cs.NA · math.DS · 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{CBDWS2JTVWYY5W2ZGHCY6WXQU5}

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.

Cited by

1 paper in Pith

A Koopman Operator Framework for Nonlinear Epidemic Dynamics: Application to an SIRSD Model

Receipt and verification

First computed	2026-05-20T01:06:05.515774Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1047696933adb18edb5931c58f5af0a75b954a8fca124445a80c0202345df5a0

Aliases

arxiv: 2508.02928 · arxiv_version: 2508.02928v3 · doi: 10.48550/arxiv.2508.02928 · pith_short_12: CBDWS2JTVWYY · pith_short_16: CBDWS2JTVWYY5W2Z · pith_short_8: CBDWS2JT

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/CBDWS2JTVWYY5W2ZGHCY6WXQU5 \
  | 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: 1047696933adb18edb5931c58f5af0a75b954a8fca124445a80c0202345df5a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "291633cfe5d7227c1b57c747acea7327a357181081b136a92d14d9274f7adba6",
    "cross_cats_sorted": [
      "cs.NA",
      "math.DS",
      "math.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "q-bio.QM",
    "submitted_at": "2025-08-04T22:02:36Z",
    "title_canon_sha256": "6e52f855e36357ecf83f2ea3174e2f9ba91e3377246faec8071ddd3fb3b7fa26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.02928",
    "kind": "arxiv",
    "version": 3
  }
}