Pith Number

pith:XDBVZ7P2

pith:2018:XDBVZ7P2MQNNIXZNEKWNFR3YZJ

not attested not anchored not stored refs pending

Interpolation with uncoupled separable matrix-valued kernels

Bernard Haasdonk, Dominik Wittwar, Gabriele Santin

arxiv:1807.09111 v1 · 2018-07-24 · 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{XDBVZ7P2MQNNIXZNEKWNFR3YZJ}

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	2026-05-17T23:56:38.543179Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8c35cfdfa641ad45f2d22acd2c778ca50c426940cf7478e881a89c2aa953442

Aliases

arxiv: 1807.09111 · arxiv_version: 1807.09111v1 · doi: 10.48550/arxiv.1807.09111 · pith_short_12: XDBVZ7P2MQNN · pith_short_16: XDBVZ7P2MQNNIXZN · pith_short_8: XDBVZ7P2

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/XDBVZ7P2MQNNIXZNEKWNFR3YZJ \
  | 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: b8c35cfdfa641ad45f2d22acd2c778ca50c426940cf7478e881a89c2aa953442

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5992c3fbb10dea00f4b458a9820fd24dc02c178bf866effee268dd578eecda3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-24T13:50:23Z",
    "title_canon_sha256": "214e33f8839e2ba320c0a6ec8f53833422a0e8586ea440f088d21debe4bc6585"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.09111",
    "kind": "arxiv",
    "version": 1
  }
}