Pith Number

pith:2R6J3W6D

pith:2018:2R6J3W6DAAFB76LZPGLSUWZJRJ

not attested not anchored not stored refs pending

Greedy regularized kernel interpolation

Bernard Haasdonk, Dominik Wittwar, Gabriele Santin

arxiv:1807.09575 v1 · 2018-07-25 · 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{2R6J3W6DAAFB76LZPGLSUWZJRJ}

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	2026-05-18T00:09:50.969090Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d47c9ddbc3000a1ff97979972a5b298a50337c4661bc10d81449faf988eb77ec

Aliases

arxiv: 1807.09575 · arxiv_version: 1807.09575v1 · doi: 10.48550/arxiv.1807.09575 · pith_short_12: 2R6J3W6DAAFB · pith_short_16: 2R6J3W6DAAFB76LZ · pith_short_8: 2R6J3W6D

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/2R6J3W6DAAFB76LZPGLSUWZJRJ \
  | 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: d47c9ddbc3000a1ff97979972a5b298a50337c4661bc10d81449faf988eb77ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3059698b9179755d941b2b134d970f1a28499b57c30b4778a1a7cdd80ba58e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-25T13:23:02Z",
    "title_canon_sha256": "26a74e8dd61b4e82ea6204616b83a0523024042e70a0fdfacf57ba8cad64eb7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.09575",
    "kind": "arxiv",
    "version": 1
  }
}