Pith Number

pith:2VZPBZVQ

pith:2015:2VZPBZVQTG2AACIGRDZQK6DDLU

not attested not anchored not stored refs pending

Cholesky factorisation of linear systems coming from finite difference approximations of singularly perturbed problems

Niall Madden, Th\'ai Anh Nhan

arxiv:1504.01904 v1 · 2015-04-08 · 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{2VZPBZVQTG2AACIGRDZQK6DDLU}

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	2026-05-18T02:19:17.858335Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d572f0e6b099b400090688f30578635d1c73a1f4087fe242d3ee58fae0627694

Aliases

arxiv: 1504.01904 · arxiv_version: 1504.01904v1 · doi: 10.48550/arxiv.1504.01904 · pith_short_12: 2VZPBZVQTG2A · pith_short_16: 2VZPBZVQTG2AACIG · pith_short_8: 2VZPBZVQ

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/2VZPBZVQTG2AACIGRDZQK6DDLU \
  | 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: d572f0e6b099b400090688f30578635d1c73a1f4087fe242d3ee58fae0627694

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15b33db0a1fc9a51e6ca0103cddaa29875f1607ef6f4d52d040543acf8eb07eb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-04-08T10:37:12Z",
    "title_canon_sha256": "f73023be065a663970e142e294eedbef6e6723c8eef72e149b4b8d2d3ee3bdfc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.01904",
    "kind": "arxiv",
    "version": 1
  }
}