Pith Number

pith:EJGYYSGL

pith:2008:EJGYYSGL72B4B45HQTA5DJLEK5

not attested not anchored not stored refs pending

Modular forms and K3 surfaces

Matthias Schuett, Noam D. Elkies

arxiv:0809.0830 v4 · 2008-09-04 · math.AG · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EJGYYSGL72B4B45HQTA5DJLEK5}

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	2026-05-18T03:30:03.349783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

224d8c48cbfe83c0f3a784c1d1a56457783e860518a3ebc34013336593638ebe

Aliases

arxiv: 0809.0830 · arxiv_version: 0809.0830v4 · doi: 10.48550/arxiv.0809.0830 · pith_short_12: EJGYYSGL72B4 · pith_short_16: EJGYYSGL72B4B45H · pith_short_8: EJGYYSGL

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/EJGYYSGL72B4B45HQTA5DJLEK5 \
  | 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: 224d8c48cbfe83c0f3a784c1d1a56457783e860518a3ebc34013336593638ebe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b99c25d1be26f56d1b71803b4481c7e43f28bbfc8652546796a8ccf136dd01fd",
    "cross_cats_sorted": [
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-09-04T15:03:12Z",
    "title_canon_sha256": "f94a6d71463d5f7db05f86a710f133f851c651898ff33066f14844f68206468a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.0830",
    "kind": "arxiv",
    "version": 4
  }
}