Pith Number

pith:M5TB4KCX

pith:2009:M5TB4KCXDTEHLJTPYYZQ6YCDYO

not attested not anchored not stored refs pending

Computing Igusa class polynomials

Marco Streng

arxiv:0903.4766 v3 · 2009-03-27 · math.NT · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M5TB4KCXDTEHLJTPYYZQ6YCDYO}

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	2026-05-18T01:35:17.091579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67661e28571cc875a66fc6330f6043c39d298dec482781619dce5c9a50b71446

Aliases

arxiv: 0903.4766 · arxiv_version: 0903.4766v3 · doi: 10.48550/arxiv.0903.4766 · pith_short_12: M5TB4KCXDTEH · pith_short_16: M5TB4KCXDTEHLJTP · pith_short_8: M5TB4KCX

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/M5TB4KCXDTEHLJTPYYZQ6YCDYO \
  | 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: 67661e28571cc875a66fc6330f6043c39d298dec482781619dce5c9a50b71446

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "180128e195fbcfdea73d7076fc1b5fa3c2fbd00bbe5b59526c84f7d0c05a0059",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2009-03-27T14:32:04Z",
    "title_canon_sha256": "252288eb750e857a3bde1b490602bc5d8b5807fdbd3ff82dc3d0b4f52b4a4d48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4766",
    "kind": "arxiv",
    "version": 3
  }
}