Pith Number

pith:E63WFHIZ

pith:2015:E63WFHIZ2MCLA2EMC2OG3GSNDP

not attested not anchored not stored refs pending

Nonlinear nonnested 2-D spline approximation

Martin Lind, Pencho Petrushev

arxiv:1506.07510 v1 · 2015-06-24 · math.CA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E63WFHIZ2MCLA2EMC2OG3GSNDP}

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	2026-05-18T01:39:53.861253Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27b7629d19d304b0688c169c6d9a4d1be3a814236c98ffdb07fc4ebb81a1f083

Aliases

arxiv: 1506.07510 · arxiv_version: 1506.07510v1 · doi: 10.48550/arxiv.1506.07510 · pith_short_12: E63WFHIZ2MCL · pith_short_16: E63WFHIZ2MCLA2EM · pith_short_8: E63WFHIZ

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/E63WFHIZ2MCLA2EMC2OG3GSNDP \
  | 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: 27b7629d19d304b0688c169c6d9a4d1be3a814236c98ffdb07fc4ebb81a1f083

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f82cacb6823b330c401055fc92a5023d6fd6e9be4aecb18fb646d7a075343e4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2015-06-24T19:39:50Z",
    "title_canon_sha256": "2bed157e8b814d1517edeb33e16d541235f969e31d7b1909a5cda058f34747d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.07510",
    "kind": "arxiv",
    "version": 1
  }
}