Pith Number

pith:JMB6DHNU

pith:2026:JMB6DHNUCH4JI5MHR4Q5MAERED

not attested not anchored not stored refs pending

An unfitted boundary algebraic equation method with Calder\'on preconditioning for 2D Stokes flow in irregular geometry

Qing Xia, Wenjun Ying

arxiv:2607.21295 v1 · 2026-07-23 · math.NA · cs.NA · physics.comp-ph · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JMB6DHNUCH4JI5MHR4Q5MAERED}

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	2026-07-24T01:24:24.076072Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4b03e19db411f89475878f21d6009120dc4323b8e9c43235a9259244ac57bf9e

Aliases

arxiv: 2607.21295 · arxiv_version: 2607.21295v1 · doi: 10.48550/arxiv.2607.21295 · pith_short_12: JMB6DHNUCH4J · pith_short_16: JMB6DHNUCH4JI5MH · pith_short_8: JMB6DHNU

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/JMB6DHNUCH4JI5MHR4Q5MAERED \
  | 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: 4b03e19db411f89475878f21d6009120dc4323b8e9c43235a9259244ac57bf9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d187de74241ad5f818fa1154e540451cb79abba33bba0e92752c3fe079070f67",
    "cross_cats_sorted": [
      "cs.NA",
      "physics.comp-ph",
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-07-23T13:20:27Z",
    "title_canon_sha256": "1832fbe8601b6e9aac5ba438916847331dc397b68e638f5b372924cb4f874a11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.21295",
    "kind": "arxiv",
    "version": 1
  }
}