Pith Number

pith:DBSY5IHB

pith:2017:DBSY5IHBZUW6DSGCPLCFEZBVYC

not attested not anchored not stored refs pending

Schur complement preconditioners for multiple saddle point problems of block tridiagonal form with application to optimization problems

Jarle Sogn, Walter Zulehner

arxiv:1708.09245 v1 · 2017-08-30 · 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{DBSY5IHBZUW6DSGCPLCFEZBVYC}

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	2026-06-04T19:10:55.763398Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18658ea0e1cd2de1c8c27ac4526435c0b41ce4600c729f8a193d7dcfe5555018

Aliases

arxiv: 1708.09245 · arxiv_version: 1708.09245v1 · doi: 10.48550/arxiv.1708.09245 · pith_short_12: DBSY5IHBZUW6 · pith_short_16: DBSY5IHBZUW6DSGC · pith_short_8: DBSY5IHB

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/DBSY5IHBZUW6DSGCPLCFEZBVYC \
  | 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: 18658ea0e1cd2de1c8c27ac4526435c0b41ce4600c729f8a193d7dcfe5555018

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63c3119847809b6612bce3edec719d286fd57f2adff0bf9763dcbfffa835f633",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-08-30T13:01:41Z",
    "title_canon_sha256": "dc202d4f47f68a874e1dd3e4d9972d4aecc634d5574b20d9d434d3c445a7b04e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.09245",
    "kind": "arxiv",
    "version": 1
  }
}