Pith Number

pith:U2ESW47Q

pith:2026:U2ESW47Q52VIRVWYZFCOFL7YKV

not attested not anchored not stored refs pending

Variational Free Energy Pivot Selection for Pivoted Cholesky

Louise Schaub, Peter Zaspel

arxiv:2606.01821 v1 · 2026-06-01 · 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{U2ESW47Q52VIRVWYZFCOFL7YKV}

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	2026-06-02T02:04:57.792299Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6892b73f0eeaa88d6d8c944e2aff855689ae585952f1ced6a69ff5aa2eacd7d

Aliases

arxiv: 2606.01821 · arxiv_version: 2606.01821v1 · doi: 10.48550/arxiv.2606.01821 · pith_short_12: U2ESW47Q52VI · pith_short_16: U2ESW47Q52VIRVWY · pith_short_8: U2ESW47Q

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/U2ESW47Q52VIRVWYZFCOFL7YKV \
  | 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: a6892b73f0eeaa88d6d8c944e2aff855689ae585952f1ced6a69ff5aa2eacd7d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f34548e3911ae4d0da595b5b546aa5cefe35da5f3df69551ef196b70b3a8f8f3",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-06-01T07:35:21Z",
    "title_canon_sha256": "57e932035d9203991701878f36fa03fbf4920ff1596ffcd3c8d3fe858b4c41f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.01821",
    "kind": "arxiv",
    "version": 1
  }
}