Pith Number

pith:PE7NPHSW

pith:2018:PE7NPHSW4EEKMJK646WNLQANCS

not attested not anchored not stored refs pending

On the existence of an ultra central approximate identity for certain semigroup algebras

A. Sahami, I. Almasi

arxiv:1801.01798 v1 · 2018-01-05 · 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{PE7NPHSW4EEKMJK646WNLQANCS}

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	2026-05-18T00:26:40.954855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

793ed79e56e108a6255ee7acd5c00d14bedaf3a188dfb803374379df5b22ba6c

Aliases

arxiv: 1801.01798 · arxiv_version: 1801.01798v1 · doi: 10.48550/arxiv.1801.01798 · pith_short_12: PE7NPHSW4EEK · pith_short_16: PE7NPHSW4EEKMJK6 · pith_short_8: PE7NPHSW

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/PE7NPHSW4EEKMJK646WNLQANCS \
  | 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: 793ed79e56e108a6255ee7acd5c00d14bedaf3a188dfb803374379df5b22ba6c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73b92d7580eb4de425411227ac3bfecd4d5b8e2f3208d94201017ebfbb3dcd75",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2018-01-05T15:47:33Z",
    "title_canon_sha256": "78babc66c0ee30cd671745084a585089b7469ac0a651a1917d810f45a565079f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.01798",
    "kind": "arxiv",
    "version": 1
  }
}