Pith Number

pith:6B3SVWEE

pith:2018:6B3SVWEEOKRTQJBJP3DCHPNVJ7

not attested not anchored not stored refs pending

Saddle Point Least Squares Preconditioning of Mixed Methods

Constantin Bacuta, Jacob Jacavage

arxiv:1805.06852 v1 · 2018-05-17 · 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{6B3SVWEEOKRTQJBJP3DCHPNVJ7}

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	2026-05-18T00:15:43.120690Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0772ad88472a33824297ec623bdb54fe14e719ecc7497a4eaada74599f8a2a1

Aliases

arxiv: 1805.06852 · arxiv_version: 1805.06852v1 · doi: 10.48550/arxiv.1805.06852 · pith_short_12: 6B3SVWEEOKRT · pith_short_16: 6B3SVWEEOKRTQJBJ · pith_short_8: 6B3SVWEE

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/6B3SVWEEOKRTQJBJP3DCHPNVJ7 \
  | 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: f0772ad88472a33824297ec623bdb54fe14e719ecc7497a4eaada74599f8a2a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "641f11cb19ea5d02b3b1e977e7d83f6913157ab81591312621d7a5724ddf7f1d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-05-17T16:49:07Z",
    "title_canon_sha256": "04ddead587bcb1af39a325075b147d4d0f18c1be6c3015744e72e90569419a9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.06852",
    "kind": "arxiv",
    "version": 1
  }
}