Pith Number

pith:NQS25JKS

pith:2009:NQS25JKSHLFBRFMKCHC3ODAEBP

not attested not anchored not stored refs pending

Surface Spline Approximation on SO(3)

Dominik Schmid, Thomas Hangelbroek

arxiv:0911.1836 v2 · 2009-11-10 · math.CA · 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{NQS25JKSHLFBRFMKCHC3ODAEBP}

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	2026-05-18T04:20:13.314887Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c25aea5523aca18958a11c5b70c040bf34c20396b9867b79b4fc77e9eb31b80

Aliases

arxiv: 0911.1836 · arxiv_version: 0911.1836v2 · doi: 10.48550/arxiv.0911.1836 · pith_short_12: NQS25JKSHLFB · pith_short_16: NQS25JKSHLFBRFMK · pith_short_8: NQS25JKS

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/NQS25JKSHLFBRFMKCHC3ODAEBP \
  | 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: 6c25aea5523aca18958a11c5b70c040bf34c20396b9867b79b4fc77e9eb31b80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0c6c6e42e2675b5c20c54a6aae28ff2fcf7d24638dda5c13282287f8f0213e2",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2009-11-10T06:26:33Z",
    "title_canon_sha256": "b242814e8954657307d3c20cb3f06c28b0a10d3a7e2c0091e818e8dea6c76719"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1836",
    "kind": "arxiv",
    "version": 2
  }
}