Pith Number

pith:FTU2EBB4

pith:2011:FTU2EBB4CKSN5X5ZCRIZTLKEID

not attested not anchored not stored refs pending

Uniform algebras and approximation on manifolds

Erlend Forn{\ae}ss Wold, H{\aa}kan Samuelsson

arxiv:1101.4840 v2 · 2011-01-25 · 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{FTU2EBB4CKSN5X5ZCRIZTLKEID}

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	2026-05-18T01:09:25.843285Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ce9a2043c12a4dedfb9145199ad4440ee82943ceb960ce80cd70fc310bf31cd

Aliases

arxiv: 1101.4840 · arxiv_version: 1101.4840v2 · doi: 10.48550/arxiv.1101.4840 · pith_short_12: FTU2EBB4CKSN · pith_short_16: FTU2EBB4CKSN5X5Z · pith_short_8: FTU2EBB4

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/FTU2EBB4CKSN5X5ZCRIZTLKEID \
  | 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: 2ce9a2043c12a4dedfb9145199ad4440ee82943ceb960ce80cd70fc310bf31cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4202c051f8e3997559abc82f081d22724a76b61aeb7fadcc10c0e80b75038d1b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2011-01-25T15:07:15Z",
    "title_canon_sha256": "0ecf5c00bbe8c84710466e2b0351ca1b0949524adc4a17ac2936ed1afd0477e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4840",
    "kind": "arxiv",
    "version": 2
  }
}