Pith Number

pith:WGKGUXIH

pith:2026:WGKGUXIHR73GYEIDTCC4LCZWFA

not attested not anchored not stored refs pending

Multifidelity Proper Orthogonal Decomposition

Karen Willcox, Nicole Aretz

arxiv:2605.29213 v1 · 2026-05-28 · math.NA · cs.CE · cs.NA · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WGKGUXIHR73GYEIDTCC4LCZWFA}

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	2026-05-29T01:05:24.629185Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1946a5d078ff66c11039885c58b36283c8f97854d82d1c1188b977a884d4016

Aliases

arxiv: 2605.29213 · arxiv_version: 2605.29213v1 · doi: 10.48550/arxiv.2605.29213 · pith_short_12: WGKGUXIHR73G · pith_short_16: WGKGUXIHR73GYEID · pith_short_8: WGKGUXIH

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/WGKGUXIHR73GYEIDTCC4LCZWFA \
  | 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: b1946a5d078ff66c11039885c58b36283c8f97854d82d1c1188b977a884d4016

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13b4241278ff7e3b4af23d23cce52892b81d9a98aac3e8809f64eedf1aac0242",
    "cross_cats_sorted": [
      "cs.CE",
      "cs.NA",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-28T00:52:27Z",
    "title_canon_sha256": "ae016c441d37ab6953e87e876d86a3fd4b0675d2c5ff0a39db34bb61b6eebd12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.29213",
    "kind": "arxiv",
    "version": 1
  }
}