Pith Number

pith:2I26WFEU

pith:2019:2I26WFEU6SRYB4MV5ZDE6O5R3P

not attested not anchored not stored refs pending

How to recognize a Leonard pair

Edward Hanson

arxiv:1901.10659 v1 · 2019-01-30 · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2I26WFEU6SRYB4MV5ZDE6O5R3P}

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	2026-05-17T23:55:06.371458Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d235eb1494f4a380f195ee464f3bb1dbcb46a7f51dfbc2284cfef89701eb4bf5

Aliases

arxiv: 1901.10659 · arxiv_version: 1901.10659v1 · doi: 10.48550/arxiv.1901.10659 · pith_short_12: 2I26WFEU6SRY · pith_short_16: 2I26WFEU6SRYB4MV · pith_short_8: 2I26WFEU

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/2I26WFEU6SRYB4MV5ZDE6O5R3P \
  | 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: d235eb1494f4a380f195ee464f3bb1dbcb46a7f51dfbc2284cfef89701eb4bf5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95cd31c6ae6440636733384d6f4a41d09ddd995d47a88a457ba873a3f28c1602",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2019-01-30T03:49:48Z",
    "title_canon_sha256": "67c7a671d876a3e80f070d02af83efca448470d9220fc142da7aa682d6e15d26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.10659",
    "kind": "arxiv",
    "version": 1
  }
}