Pith Number

pith:4U3TPGQT

pith:2016:4U3TPGQTONSP5JTXKTWIEHQKIW

not attested not anchored not stored refs pending

Factorizing the factorization - a spectral-element solver for elliptic equations with linear operation count

Immo Huismann, Jochen Fr\"ohlich, J\"org Stiller

arxiv:1601.08179 v1 · 2016-01-29 · cs.NA · 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{4U3TPGQTONSP5JTXKTWIEHQKIW}

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	2026-05-18T00:37:18.946523Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e537379a137364fea67754ec821e0a45a61c3b6dfc29934350b3520f06eb94ec

Aliases

arxiv: 1601.08179 · arxiv_version: 1601.08179v1 · doi: 10.48550/arxiv.1601.08179 · pith_short_12: 4U3TPGQTONSP · pith_short_16: 4U3TPGQTONSP5JTX · pith_short_8: 4U3TPGQT

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/4U3TPGQTONSP5JTXKTWIEHQKIW \
  | 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: e537379a137364fea67754ec821e0a45a61c3b6dfc29934350b3520f06eb94ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a196c3ce44276d0c137ebea0f4c0096d4a3c75d0290b4e9eaf4560b622c21e0",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2016-01-29T16:21:36Z",
    "title_canon_sha256": "c24712b258f009c2963e1a6f5cdf51eec53d04f7e6214229636af2dea7d7d490"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.08179",
    "kind": "arxiv",
    "version": 1
  }
}