Pith Number

pith:4Q734FQI

pith:2018:4Q734FQICKBX6DHPDOADK2LEIZ

not attested not anchored not stored refs pending

Approximate biflatness and Johnson pseudo-contractibility of some Banach algebras

Amir Sahami

arxiv:1806.04198 v3 · 2018-06-11 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4Q734FQICKBX6DHPDOADK2LEIZ}

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	2026-05-18T00:06:45.888727Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e43fbe160812837f0cef1b80356964465789e069ad34c5ebea85d94d125ad100

Aliases

arxiv: 1806.04198 · arxiv_version: 1806.04198v3 · doi: 10.48550/arxiv.1806.04198 · pith_short_12: 4Q734FQICKBX · pith_short_16: 4Q734FQICKBX6DHP · pith_short_8: 4Q734FQI

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/4Q734FQICKBX6DHPDOADK2LEIZ \
  | 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: e43fbe160812837f0cef1b80356964465789e069ad34c5ebea85d94d125ad100

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "03c5f1ae67e5e6375e98560ea8ebde55878f63d29068c344d802822396c2b738",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2018-06-11T19:08:50Z",
    "title_canon_sha256": "74f210f0cf914327c9ec97e97b09d624a91e81c13c0fc93c0f03e3bc666f8933"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.04198",
    "kind": "arxiv",
    "version": 3
  }
}