Pith Number

pith:U74H3K5Q

pith:2013:U74H3K5QIGUTWEQQRZQWAREO3X

not attested not anchored not stored refs pending

Active subspace methods in theory and practice: applications to kriging surfaces

Eric Dow, Paul G. Constantine, Qiqi Wang

arxiv:1304.2070 v2 · 2013-04-07 · 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{U74H3K5QIGUTWEQQRZQWAREO3X}

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	2026-05-18T02:46:32.912866Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7f87dabb041a93b12108e6160448edde5d36ba81840367736a41ea8f8e34d13

Aliases

arxiv: 1304.2070 · arxiv_version: 1304.2070v2 · doi: 10.48550/arxiv.1304.2070 · pith_short_12: U74H3K5QIGUT · pith_short_16: U74H3K5QIGUTWEQQ · pith_short_8: U74H3K5Q

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/U74H3K5QIGUTWEQQRZQWAREO3X \
  | 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: a7f87dabb041a93b12108e6160448edde5d36ba81840367736a41ea8f8e34d13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b736cdc1a48ece55328d29f86e2c1826ca7ab059d653fcad29ace51e0154968c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-04-07T22:13:17Z",
    "title_canon_sha256": "9a3cb8670868752dd405d7391974decff7f8da59cb2b57a18e58a5e2f3530edc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2070",
    "kind": "arxiv",
    "version": 2
  }
}