Pith Number

pith:O3E2IJIV

pith:1994:O3E2IJIVAAZWM3E6RJU27VDK33

not attested not anchored not stored refs pending

Algorithmic work with orthogonal polynomials and special functions

Wolfram Koepf

arxiv:math/9404220 v1 · 1994-04-19 · 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{O3E2IJIVAAZWM3E6RJU27VDK33}

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	2026-05-18T01:05:51.463361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76c9a425150033666c9e8a69afd46adeff7fceb546573314c0091dc2a5daa5b6

Aliases

arxiv: math/9404220 · arxiv_version: math/9404220v1 · doi: 10.48550/arxiv.math/9404220 · pith_short_12: O3E2IJIVAAZW · pith_short_16: O3E2IJIVAAZWM3E6 · pith_short_8: O3E2IJIV

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/O3E2IJIVAAZWM3E6RJU27VDK33 \
  | 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: 76c9a425150033666c9e8a69afd46adeff7fceb546573314c0091dc2a5daa5b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9d8bd0d6701d3668313f9d6b5f2650d8d91ffc10570e2a487bb574f452ebe9c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.CA",
    "submitted_at": "1994-04-19T00:00:00Z",
    "title_canon_sha256": "af6dc0974a6fabc4f260317e76bf88f19ad9e1974df0cd3464d03bf43cfbf46b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9404220",
    "kind": "arxiv",
    "version": 1
  }
}