Pith Number

pith:OIKSR6HK

pith:2015:OIKSR6HKWULDXA6Q6WJDPH6RWI

not attested not anchored not stored refs pending

New refinable spaces and local approximation estimates for hierarchical splines

Annalisa Buffa, Eduardo M. Garau

arxiv:1507.06534 v1 · 2015-07-23 · 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{OIKSR6HKWULDXA6Q6WJDPH6RWI}

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	2026-05-18T01:36:24.704649Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

721528f8eab5163b83d0f592379fd1b23dbf042c3d07dec12cdf477d10775912

Aliases

arxiv: 1507.06534 · arxiv_version: 1507.06534v1 · doi: 10.48550/arxiv.1507.06534 · pith_short_12: OIKSR6HKWULD · pith_short_16: OIKSR6HKWULDXA6Q · pith_short_8: OIKSR6HK

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/OIKSR6HKWULDXA6Q6WJDPH6RWI \
  | 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: 721528f8eab5163b83d0f592379fd1b23dbf042c3d07dec12cdf477d10775912

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83371ffa1d7fd06dacdf46e030418fc59064f43b617de8cc65e1e1bf21254088",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-07-23T15:32:14Z",
    "title_canon_sha256": "cecc798d769be23c817a2ca2d3aee55e2a794986a87611ed4517dc59204880ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.06534",
    "kind": "arxiv",
    "version": 1
  }
}