Pith Number

pith:OUBTF4DK

pith:2009:OUBTF4DKLUOFEZLHUI3VPVU5H2

not attested not anchored not stored refs pending

Solving the Poisson equation on small aspect ratio domains using unstructured meshes

C.C. Pain, C.J. Cotter, S.C. Kramer

arxiv:0912.1976 v1 · 2009-12-10 · math.NA · physics.ao-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OUBTF4DKLUOFEZLHUI3VPVU5H2}

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	2026-05-18T02:10:24.875953Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

750332f06a5d1c526567a23757d69d3e9e147a7c327dafc3b5159993945bdb68

Aliases

arxiv: 0912.1976 · arxiv_version: 0912.1976v1 · doi: 10.48550/arxiv.0912.1976 · pith_short_12: OUBTF4DKLUOF · pith_short_16: OUBTF4DKLUOFEZLH · pith_short_8: OUBTF4DK

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/OUBTF4DKLUOFEZLHUI3VPVU5H2 \
  | 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: 750332f06a5d1c526567a23757d69d3e9e147a7c327dafc3b5159993945bdb68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5943427b0361c3ce37174f586d73f35100b091abbb0c26bac9febd88ae8f973d",
    "cross_cats_sorted": [
      "physics.ao-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-12-10T12:10:05Z",
    "title_canon_sha256": "b7ff335712bdb48b04ac55000d5835dc2769a81e23ff5fb3b14b504c5d530c54"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1976",
    "kind": "arxiv",
    "version": 1
  }
}