Pith Number

pith:KWKGGY2W

pith:2016:KWKGGY2WTW52XKW5WRGPYRWIDF

not attested not anchored not stored refs pending

A note on the equioscillation theorem for best ridge function approximation

Vugar Ismailov

arxiv:1609.08424 v1 · 2016-09-27 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KWKGGY2WTW52XKW5WRGPYRWIDF}

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	2026-05-18T01:03:45.919895Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55946363569dbbabaaddb44cfc46c819673c006c230f4d8601330071071639f0

Aliases

arxiv: 1609.08424 · arxiv_version: 1609.08424v1 · doi: 10.48550/arxiv.1609.08424 · pith_short_12: KWKGGY2WTW52 · pith_short_16: KWKGGY2WTW52XKW5 · pith_short_8: KWKGGY2W

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/KWKGGY2WTW52XKW5WRGPYRWIDF \
  | 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: 55946363569dbbabaaddb44cfc46c819673c006c230f4d8601330071071639f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4ab2529072bb8085e886f9c2dc1638de0f6f4c49ab2bc51b67b2c5f626e5abb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2016-09-27T13:31:07Z",
    "title_canon_sha256": "6673c5a8b553e259f7af54d192b2412a9971154379ac0219996a3ff7a582b77b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.08424",
    "kind": "arxiv",
    "version": 1
  }
}