Pith Number

pith:SFPFCYIK

pith:2026:SFPFCYIKLE6D4LVL4H5DOJS4AH

not attested not anchored not stored refs pending

WING: A Simple Windowed Nonorthogonalized Initial Guess Procedure for Repeated Matrix Solves

Boyce E. Griffith, David Wells, Matthew G. Knepley

arxiv:2606.10132 v1 · 2026-06-08 · math.NA · cs.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{SFPFCYIKLE6D4LVL4H5DOJS4AH}

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	2026-06-10T01:08:55.988835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

915e51610a593c3e2eabe1fa37265c01c4a79ade94fb03c60d52c1c8f7f25cb8

Aliases

arxiv: 2606.10132 · arxiv_version: 2606.10132v1 · doi: 10.48550/arxiv.2606.10132 · pith_short_12: SFPFCYIKLE6D · pith_short_16: SFPFCYIKLE6D4LVL · pith_short_8: SFPFCYIK

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/SFPFCYIKLE6D4LVL4H5DOJS4AH \
  | 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: 915e51610a593c3e2eabe1fa37265c01c4a79ade94fb03c60d52c1c8f7f25cb8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43c07d7aa44bf1d8f4f928209f4d331bd8025fcc1bf821548e0a9da13ca69182",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-06-08T20:07:52Z",
    "title_canon_sha256": "10c2e578dcfb41e32ce2b05860aba42cd59300f73f0a4989530981ea57cc012a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.10132",
    "kind": "arxiv",
    "version": 1
  }
}