Pith Number

pith:PDXMPMHD

pith:2025:PDXMPMHDD7UVCCQZQF7WZAFRNN

not attested not anchored not stored refs pending

A new addition to the zoo of isolated symplectic singularities

Callum Berry

arxiv:2505.24524 v1 · 2025-05-30 · math.AG · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PDXMPMHDD7UVCCQZQF7WZAFRNN}

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	2026-07-05T11:12:51.738268Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78eec7b0e31fe9510a19817f6c80b16b42e23813f293719d2a5860d4bd879897

Aliases

arxiv: 2505.24524 · arxiv_version: 2505.24524v1 · doi: 10.48550/arxiv.2505.24524 · pith_short_12: PDXMPMHDD7UV · pith_short_16: PDXMPMHDD7UVCCQZ · pith_short_8: PDXMPMHD

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/PDXMPMHDD7UVCCQZQF7WZAFRNN \
  | 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: 78eec7b0e31fe9510a19817f6c80b16b42e23813f293719d2a5860d4bd879897

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cdf4abb244f3d9d0efe21f45e78bfb65110c0d0c7569363bc71db867dfa09c9b",
    "cross_cats_sorted": [
      "math.RT"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2025-05-30T12:33:52Z",
    "title_canon_sha256": "b316a4dc276301a2b29d296e0d5204e8729b7e9419107d0e02a3d44887cc7427"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.24524",
    "kind": "arxiv",
    "version": 1
  }
}