Pith Number

pith:QSHTFI43

pith:2026:QSHTFI435FIKEEDKVTKZIQMYZW

not attested not anchored not stored refs pending

On homological finiteness properties and free inverse monoids

Carl-Fredrik Nyberg-Brodda

arxiv:2606.30434 v1 · 2026-06-29 · math.GR · 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{QSHTFI435FIKEEDKVTKZIQMYZW}

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	2026-06-30T02:18:15.033146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

848f32a39be950a2106aacd5944198cda95d1c021b87bc509958c27b61c644a0

Aliases

arxiv: 2606.30434 · arxiv_version: 2606.30434v1 · doi: 10.48550/arxiv.2606.30434 · pith_short_12: QSHTFI435FIK · pith_short_16: QSHTFI435FIKEEDK · pith_short_8: QSHTFI43

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/QSHTFI435FIKEEDKVTKZIQMYZW \
  | 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: 848f32a39be950a2106aacd5944198cda95d1c021b87bc509958c27b61c644a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4926f3432bd6c92c825320c0fddac3c430b2936b8f99100f16c4bf6e1aa1acb6",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2026-06-29T15:11:56Z",
    "title_canon_sha256": "d8b87333b816600d37bb73c7aacb26a154ade244eb274fafb924ce295a47fae5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.30434",
    "kind": "arxiv",
    "version": 1
  }
}