Pith Number

pith:IRLVTLCM

pith:2009:IRLVTLCMG4V6ERS3DKK4XTNHZH

not attested not anchored not stored refs pending

Characterising derivations from the disc algebra to its dual

Matthew J. Heath, Yemon Choi

arxiv:0909.1867 v2 · 2009-09-10 · math.FA · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IRLVTLCMG4V6ERS3DKK4XTNHZH}

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	2026-05-18T04:31:12.017141Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

445759ac4c372be2465b1a95cbcda7c9cacf71bcda486dd9f5c8d59463a27593

Aliases

arxiv: 0909.1867 · arxiv_version: 0909.1867v2 · doi: 10.48550/arxiv.0909.1867 · pith_short_12: IRLVTLCMG4V6 · pith_short_16: IRLVTLCMG4V6ERS3 · pith_short_8: IRLVTLCM

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/IRLVTLCMG4V6ERS3DKK4XTNHZH \
  | 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: 445759ac4c372be2465b1a95cbcda7c9cacf71bcda486dd9f5c8d59463a27593

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3e03a5108559ce6b845f954c8000ac45de30b36d681d33eb6cdfab97b6e878d",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2009-09-10T05:08:26Z",
    "title_canon_sha256": "4c50b0b0717ece99b791129eab592bb0351a69e1d9f8548ab266e8ff69902f58"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1867",
    "kind": "arxiv",
    "version": 2
  }
}