Pith Number

pith:K6BNGXWC

pith:2014:K6BNGXWC3IXZT4CAOVKFWZBJDD

not attested not anchored not stored refs pending

Convex polynomial approximation in $R^d$ with Freud weights

Andriy Prymak, Oleksandr Maizlish

arxiv:1408.2131 v3 · 2014-08-09 · 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{K6BNGXWC3IXZT4CAOVKFWZBJDD}

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	2026-05-18T02:37:44.395375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5782d35ec2da2f99f04075545b642918ee35f6920311202ef9e8c5ec5d93ddae

Aliases

arxiv: 1408.2131 · arxiv_version: 1408.2131v3 · doi: 10.48550/arxiv.1408.2131 · pith_short_12: K6BNGXWC3IXZ · pith_short_16: K6BNGXWC3IXZT4CA · pith_short_8: K6BNGXWC

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/K6BNGXWC3IXZT4CAOVKFWZBJDD \
  | 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: 5782d35ec2da2f99f04075545b642918ee35f6920311202ef9e8c5ec5d93ddae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50805b8e33a665466a21c62e51b6f7ef7a0917cc72fd9955940dcc2f84d758b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2014-08-09T16:08:07Z",
    "title_canon_sha256": "9d803b92db0d41bb5a81c9323b00cc2c0d7cf75920f6dbbc78e99bddb1330d0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.2131",
    "kind": "arxiv",
    "version": 3
  }
}