Pith Number

pith:QN62D5EW

pith:2018:QN62D5EW7SBFR3JKQS3ZIDOGAR

not attested not anchored not stored refs pending

Uniform approximation on the sphere by least squares polynomials

Marc Van Barel, Woula Themistoclakis

arxiv:1806.00439 v2 · 2018-06-01 · 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{QN62D5EW7SBFR3JKQS3ZIDOGAR}

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	2026-05-18T00:08:30.933259Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

837da1f496fc8258ed2a84b7940dc6045b89baaaaee6b5d72fa2f560ff2b3464

Aliases

arxiv: 1806.00439 · arxiv_version: 1806.00439v2 · doi: 10.48550/arxiv.1806.00439 · pith_short_12: QN62D5EW7SBF · pith_short_16: QN62D5EW7SBFR3JK · pith_short_8: QN62D5EW

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/QN62D5EW7SBFR3JKQS3ZIDOGAR \
  | 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: 837da1f496fc8258ed2a84b7940dc6045b89baaaaee6b5d72fa2f560ff2b3464

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fc14d5a0701c120d507433f21465c88fd4206fed555b9e8bcd381f6e57b32e9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-06-01T16:54:41Z",
    "title_canon_sha256": "fffca4eec8795370cbde268dc850464c6589848caf19189e1d3a64862861a1bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.00439",
    "kind": "arxiv",
    "version": 2
  }
}