Pith Number

pith:MELW5LTV

pith:2019:MELW5LTVXV6RYV6KW5KFXSYDWO

not attested not anchored not stored refs pending

A characterization of graded von Neumann regular rings with applications to Leavitt path algebras

Daniel L\"annstr\"om

arxiv:1910.10390 v1 · 2019-10-23 · 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{MELW5LTVXV6RYV6KW5KFXSYDWO}

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	2026-07-05T00:14:24.534251Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

61176eae75bd7d1c57cab7545bcb03b381fe0a261c87ec33d5a835b387e5c5fb

Aliases

arxiv: 1910.10390 · arxiv_version: 1910.10390v1 · doi: 10.48550/arxiv.1910.10390 · pith_short_12: MELW5LTVXV6R · pith_short_16: MELW5LTVXV6RYV6K · pith_short_8: MELW5LTV

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/MELW5LTVXV6RYV6KW5KFXSYDWO \
  | 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: 61176eae75bd7d1c57cab7545bcb03b381fe0a261c87ec33d5a835b387e5c5fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e893aa3c90afdf81d683f6a005aeb50d1ce18b3cd27d2dc804703a3ffa7f885b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2019-10-23T07:24:44Z",
    "title_canon_sha256": "2c316c466f8dc21ca323ac9bf39b785531bcd080cac88b06329fc7e253e8acb4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1910.10390",
    "kind": "arxiv",
    "version": 1
  }
}