Pith Number

pith:B4NLEKJC

pith:1999:B4NLEKJCQPMPFPDGZTFCBGWMC4

not attested not anchored not stored refs pending

The search for differential equations for certain sets of orthogonal polynomials

Roelof Koekoek

arxiv:math/9908142 v1 · 1999-08-27 · 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{B4NLEKJCQPMPFPDGZTFCBGWMC4}

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	2026-07-04T14:41:17.349749Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f1ab2292283d8f2bc66ccca209acc1726cc87efbff82ebdf8a4608e58526d38

Aliases

arxiv: math/9908142 · arxiv_version: math/9908142v1 · doi: 10.48550/arxiv.math/9908142 · pith_short_12: B4NLEKJCQPMP · pith_short_16: B4NLEKJCQPMPFPDG · pith_short_8: B4NLEKJC

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/B4NLEKJCQPMPFPDGZTFCBGWMC4 \
  | 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: 0f1ab2292283d8f2bc66ccca209acc1726cc87efbff82ebdf8a4608e58526d38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5ce67b8d31a1fb254016bda3f68d82ffed54b6da31ee16b4cb324df91a4995c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.CA",
    "submitted_at": "1999-08-27T14:00:46Z",
    "title_canon_sha256": "53a4994408b633e838d2e9a586be05a595e1b63f3e9d1e4b6e794a859da71ba3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9908142",
    "kind": "arxiv",
    "version": 1
  }
}