Pith Number

pith:XZ2SQMI2

pith:2017:XZ2SQMI22ZYT66WOC2UG32MRSY

not attested not anchored not stored refs pending

A preconditioning approach for improved estimation of sparse polynomial chaos expansions

Hadi Meidani, Negin Alemazkoor

arxiv:1709.07557 v2 · 2017-09-22 · stat.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XZ2SQMI22ZYT66WOC2UG32MRSY}

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	2026-05-18T00:03:09.464275Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be7528311ad6713f7ace16a86de991963871a7e1e1fc00c5c5ba2cf54c33fbee

Aliases

arxiv: 1709.07557 · arxiv_version: 1709.07557v2 · doi: 10.48550/arxiv.1709.07557 · pith_short_12: XZ2SQMI22ZYT · pith_short_16: XZ2SQMI22ZYT66WO · pith_short_8: XZ2SQMI2

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/XZ2SQMI22ZYT66WOC2UG32MRSY \
  | 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: be7528311ad6713f7ace16a86de991963871a7e1e1fc00c5c5ba2cf54c33fbee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "876d0c52116f2ced5d7cb6ab20b5532927e34f20a37ea6a27ad35ea924d79e73",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2017-09-22T01:05:44Z",
    "title_canon_sha256": "a0a7207eb204bbae1e70aef82ea448aed3937f4e63943e2954070e95c36dc3c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.07557",
    "kind": "arxiv",
    "version": 2
  }
}