Pith Number

pith:5SPGAX2L

pith:2004:5SPGAX2LVQFVM6IY5PZOBQSWRM

not attested not anchored not stored refs pending

The C*-algebra of a vector bundle and fields of Cuntz algebras

Ezio Vasselli

arxiv:math/0404166 v2 · 2004-04-07 · math.OA · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5SPGAX2LVQFVM6IY5PZOBQSWRM}

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	2026-05-18T04:08:05.446323Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec9e605f4bac0b567918ebf2e0c2568b28bf77a4c3a5cb8fd7660bbf18666fed

Aliases

arxiv: math/0404166 · arxiv_version: math/0404166v2 · doi: 10.48550/arxiv.math/0404166 · pith_short_12: 5SPGAX2LVQFV · pith_short_16: 5SPGAX2LVQFVM6IY · pith_short_8: 5SPGAX2L

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/5SPGAX2LVQFVM6IY5PZOBQSWRM \
  | 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: ec9e605f4bac0b567918ebf2e0c2568b28bf77a4c3a5cb8fd7660bbf18666fed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b989f81728351459b7af3e5c06718f1183c398ad839cba1d60ab0c17c283f0fd",
    "cross_cats_sorted": [
      "math.KT"
    ],
    "license": "",
    "primary_cat": "math.OA",
    "submitted_at": "2004-04-07T16:52:20Z",
    "title_canon_sha256": "8152e0e9e492b09ec3cc22c750afa0c238f274218584160da9c370db59053602"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0404166",
    "kind": "arxiv",
    "version": 2
  }
}