Pith Number

pith:C5WRAAPO

pith:2009:C5WRAAPODH4EODWLZRYF6TJEOR

not attested not anchored not stored refs pending

Iterative solution of piecewise linear systems for the numerical solution of obstacle problems

Alessandra Sestini, Luigi Brugnano

arxiv:0912.3222 v1 · 2009-12-16 · 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{C5WRAAPODH4EODWLZRYF6TJEOR}

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	2026-05-18T03:53:07.320124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

176d1001ee19f8470ecbcc705f4d2474542f11f3f5e82efe425f2160999f4771

Aliases

arxiv: 0912.3222 · arxiv_version: 0912.3222v1 · doi: 10.48550/arxiv.0912.3222 · pith_short_12: C5WRAAPODH4E · pith_short_16: C5WRAAPODH4EODWL · pith_short_8: C5WRAAPO

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/C5WRAAPODH4EODWLZRYF6TJEOR \
  | 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: 176d1001ee19f8470ecbcc705f4d2474542f11f3f5e82efe425f2160999f4771

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "755a5c0cce0de90772591b9b0988d19a4fd6cc94dfc592b6642a2d595e2a9745",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-12-16T18:40:28Z",
    "title_canon_sha256": "802810e986ca46bc350e2aeb9459e9bdb9779b02bc8509afa44f86c03b570a09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.3222",
    "kind": "arxiv",
    "version": 1
  }
}