Pith Number

pith:MQ662G44

pith:2016:MQ662G44MK6MP4S67JJPZKDQDA

not attested not anchored not stored refs pending

$\infty$-constructible Subsemigroups of $M_2(\mathbb{C})$

Yatir Halevi

arxiv:1607.03603 v2 · 2016-07-13 · math.LO · 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{MQ662G44MK6MP4S67JJPZKDQDA}

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	2026-05-18T00:19:04.520288Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

643ded1b9c62bcc7f25efa52fca8701812781b86ac39715af8464f5b96b56091

Aliases

arxiv: 1607.03603 · arxiv_version: 1607.03603v2 · doi: 10.48550/arxiv.1607.03603 · pith_short_12: MQ662G44MK6M · pith_short_16: MQ662G44MK6MP4S6 · pith_short_8: MQ662G44

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/MQ662G44MK6MP4S67JJPZKDQDA \
  | 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: 643ded1b9c62bcc7f25efa52fca8701812781b86ac39715af8464f5b96b56091

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2345e8855033e011dad3a27bacd88b371909bca28ce1edd9a08163ed2ad4c232",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2016-07-13T06:27:21Z",
    "title_canon_sha256": "d7c52c7565c80d1543b213a98ba50d2c0708f22d769df4958570254a2cb6fffb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.03603",
    "kind": "arxiv",
    "version": 2
  }
}