Pith Number

pith:OBX3OBJZ

pith:2018:OBX3OBJZXDUMZ33BKQXD5WJURI

not attested not anchored not stored refs pending

A Kunz-type characterization of regular rings via alterations

Karl Schwede, Linquan Ma

arxiv:1810.08172 v2 · 2018-10-18 · math.AC · 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{OBX3OBJZXDUMZ33BKQXD5WJURI}

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	2026-05-17T23:42:42.902536Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

706fb70539b8e8ccef61542e3ed9348a346332a51461648394ced280e87f4549

Aliases

arxiv: 1810.08172 · arxiv_version: 1810.08172v2 · doi: 10.48550/arxiv.1810.08172 · pith_short_12: OBX3OBJZXDUM · pith_short_16: OBX3OBJZXDUMZ33B · pith_short_8: OBX3OBJZ

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/OBX3OBJZXDUMZ33BKQXD5WJURI \
  | 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: 706fb70539b8e8ccef61542e3ed9348a346332a51461648394ced280e87f4549

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d043fe7789f37f825e783beb631ed3fa5b3836ac44eb91316dfb70a90b665b9",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AC",
    "submitted_at": "2018-10-18T17:25:26Z",
    "title_canon_sha256": "2e720dc52c5f66b05473565d9ad398618b2c296e8cf36d1e01a0d3fb6c0a0ab9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.08172",
    "kind": "arxiv",
    "version": 2
  }
}