Pith Number

pith:Y4OLKRL7

pith:2024:Y4OLKRL7TU36ZDOVGX6GTTVXOA

not attested not anchored not stored refs pending

A Comparison of Sparse Solvers for Severely Ill-Conditioned Linear Systems in Geophysical Marker-In-Cell Simulations

Marcel Ferrari

arxiv:2409.11515 v2 · 2024-09-17 · math.NA · cs.NA · physics.comp-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{Y4OLKRL7TU36ZDOVGX6GTTVXOA}

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	2026-07-05T09:10:32.667154Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c71cb5457f9d37ec8dd535fc69ceb7700b9bc2e9262b998c929e56cb0d233e3b

Aliases

arxiv: 2409.11515 · arxiv_version: 2409.11515v2 · doi: 10.48550/arxiv.2409.11515 · pith_short_12: Y4OLKRL7TU36 · pith_short_16: Y4OLKRL7TU36ZDOV · pith_short_8: Y4OLKRL7

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/Y4OLKRL7TU36ZDOVGX6GTTVXOA \
  | 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: c71cb5457f9d37ec8dd535fc69ceb7700b9bc2e9262b998c929e56cb0d233e3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72f1961b595f12111b9bb258b2eede94f9d9fd1149b36cd97af7b320277d18fa",
    "cross_cats_sorted": [
      "cs.NA",
      "physics.comp-ph"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2024-09-17T19:38:43Z",
    "title_canon_sha256": "8483f244d09abecf571c501fed5e5d6caafdfd73477ec08714ca673e068734c8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2409.11515",
    "kind": "arxiv",
    "version": 2
  }
}