Pith Number

pith:IACSZ7E5

pith:2011:IACSZ7E5F7N2OXAH3AKF3TJSUS

not attested not anchored not stored refs pending

A high-order accurate discretization scheme for variable coefficient elliptic PDEs in the plane with smooth solutions

Per-Gunnar Martinsson

arxiv:1101.3383 v1 · 2011-01-18 · 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{IACSZ7E5F7N2OXAH3AKF3TJSUS}

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	2026-05-18T02:22:51.829341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

40052cfc9d2fdba75c07d8145dcd32a482fc7a39f46ec32847cd00da1b322e14

Aliases

arxiv: 1101.3383 · arxiv_version: 1101.3383v1 · doi: 10.48550/arxiv.1101.3383 · pith_short_12: IACSZ7E5F7N2 · pith_short_16: IACSZ7E5F7N2OXAH · pith_short_8: IACSZ7E5

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/IACSZ7E5F7N2OXAH3AKF3TJSUS \
  | 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: 40052cfc9d2fdba75c07d8145dcd32a482fc7a39f46ec32847cd00da1b322e14

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "045c5c2c2b6ba87b613cc4a9d2ae1c061a126f037289dd7e3c0ec5c2e82322db",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-01-18T04:46:03Z",
    "title_canon_sha256": "c8cad338ddb8e162e7969eddf99b2470c8192af0abc514b81483374658734b85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.3383",
    "kind": "arxiv",
    "version": 1
  }
}