Pith Number

pith:DSKQZTX5

pith:2018:DSKQZTX5GMLGPJ3IYWVCF5FBHJ

not attested not anchored not stored refs pending

A Robust Preconditioner for High-Contrast Problems

Daria Kurzanova, Yuliya Gorb, Yuri Kuznetsov

arxiv:1801.01578 v1 · 2018-01-04 · 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{DSKQZTX5GMLGPJ3IYWVCF5FBHJ}

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	2026-05-18T00:26:41.762257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c950ccefd331667a768c5aa22f4a13a5e008a304af51781afb8d6a7563fa197

Aliases

arxiv: 1801.01578 · arxiv_version: 1801.01578v1 · doi: 10.48550/arxiv.1801.01578 · pith_short_12: DSKQZTX5GMLG · pith_short_16: DSKQZTX5GMLGPJ3I · pith_short_8: DSKQZTX5

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/DSKQZTX5GMLGPJ3IYWVCF5FBHJ \
  | 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: 1c950ccefd331667a768c5aa22f4a13a5e008a304af51781afb8d6a7563fa197

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c44e0603ec2c64dbe50f35755c4e458c90179fb4e0a029d2df7ab6068c605a09",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-01-04T23:15:23Z",
    "title_canon_sha256": "36ff62d0da12cc1805edcb5b3282d544cdb3b8bb1330ce27501bebaebc390651"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.01578",
    "kind": "arxiv",
    "version": 1
  }
}