Pith Number

pith:NQ3VJPZD

pith:2019:NQ3VJPZDS3DER7HRQIMYIPE2JL

not attested not anchored not stored refs pending

An ultrapower construction of the multiplier algebra of a $C^{\ast}$-algebra and an application to boundary amenability of groups

Facundo Poggi, Roman Sasyk

arxiv:1903.07249 v3 · 2019-03-18 · math.OA · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NQ3VJPZDS3DER7HRQIMYIPE2JL}

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	2026-05-17T23:40:17.398369Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c3754bf2396c648fcf18219843c9a4ae7af8b585422127ddacee30278a84af8

Aliases

arxiv: 1903.07249 · arxiv_version: 1903.07249v3 · doi: 10.48550/arxiv.1903.07249 · pith_short_12: NQ3VJPZDS3DE · pith_short_16: NQ3VJPZDS3DER7HR · pith_short_8: NQ3VJPZD

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/NQ3VJPZDS3DER7HRQIMYIPE2JL \
  | 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: 6c3754bf2396c648fcf18219843c9a4ae7af8b585422127ddacee30278a84af8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be21bf99710a2ac7ecf2db3bf8961a713aac7f8733b37086fbab4efd0c474998",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2019-03-18T04:18:27Z",
    "title_canon_sha256": "7e8e76d6b9973aa9715dd2302bbc7d6d4528eeb8468f9e03593fdb4aaa151db6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07249",
    "kind": "arxiv",
    "version": 3
  }
}