Pith Number

pith:ESDMF7N6

pith:2025:ESDMF7N6CU6KHD3PDNR272HVAR

not attested not anchored not stored refs pending

Low-rank approximation of analytic kernels

Marcus Webb

arxiv:2509.14017 v4 · 2025-09-17 · 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{ESDMF7N6CU6KHD3PDNR272HVAR}

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	2026-06-19T16:11:12.856064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2486c2fdbe153ca38f6f1b63afe8f5045dbc50cb269969749d9e5dd776acfb7b

Aliases

arxiv: 2509.14017 · arxiv_version: 2509.14017v4 · doi: 10.48550/arxiv.2509.14017 · pith_short_12: ESDMF7N6CU6K · pith_short_16: ESDMF7N6CU6KHD3P · pith_short_8: ESDMF7N6

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/ESDMF7N6CU6KHD3PDNR272HVAR \
  | 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: 2486c2fdbe153ca38f6f1b63afe8f5045dbc50cb269969749d9e5dd776acfb7b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "765d385bcfab198e71bd350279fbd79eb5cb68ab052a1b7e6540645c3a294fc9",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2025-09-17T14:24:47Z",
    "title_canon_sha256": "d74d53c740d6358c3214b4f1047d85277f82d497b0f0201beb7bdef3ec402949"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.14017",
    "kind": "arxiv",
    "version": 4
  }
}