Pith Number

pith:TE47RGN7

pith:2009:TE47RGN7EL7BSEIVK2KXUECCF4

not attested not anchored not stored refs pending

Semigroups of Local Homeomorphisms

Justin R. Peters

arxiv:0902.2380 v4 · 2009-02-13 · math.OA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TE47RGN7EL7BSEIVK2KXUECCF4}

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	2026-05-18T04:42:14.706181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9939f899bf22fe19111556957a10422f1b964acb6c01896f8089e7ed12e02a6f

Aliases

arxiv: 0902.2380 · arxiv_version: 0902.2380v4 · doi: 10.48550/arxiv.0902.2380 · pith_short_12: TE47RGN7EL7B · pith_short_16: TE47RGN7EL7BSEIV · pith_short_8: TE47RGN7

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/TE47RGN7EL7BSEIVK2KXUECCF4 \
  | 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: 9939f899bf22fe19111556957a10422f1b964acb6c01896f8089e7ed12e02a6f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b14c1053ec9b3050df30cc1afbc517e1f1e4dc0a5e375171a58e1d84021eea8f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2009-02-13T19:49:42Z",
    "title_canon_sha256": "2a564269dfbbbce036d6bd564e03af59b0408323036e40249b4985a0a610aca8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2380",
    "kind": "arxiv",
    "version": 4
  }
}