Pith Number

pith:J4F7ZIMW

pith:2011:J4F7ZIMWE6ATHPKNHDQ24W7B3D

not attested not anchored not stored refs pending

On Rigidity of Roe algebras

Jan Spakula, Rufus Willett

arxiv:1110.1532 v2 · 2011-10-07 · 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{J4F7ZIMWE6ATHPKNHDQ24W7B3D}

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	2026-05-18T03:12:35.329517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f0bfca196278133bd4d38e1ae5be1d8df9aa69191fce27a349515041e0b8f60

Aliases

arxiv: 1110.1532 · arxiv_version: 1110.1532v2 · doi: 10.48550/arxiv.1110.1532 · pith_short_12: J4F7ZIMWE6AT · pith_short_16: J4F7ZIMWE6ATHPKN · pith_short_8: J4F7ZIMW

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/J4F7ZIMWE6ATHPKNHDQ24W7B3D \
  | 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: 4f0bfca196278133bd4d38e1ae5be1d8df9aa69191fce27a349515041e0b8f60

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "630e4b4ece9f2d84a46dc83cd0f293fbac05fdf9270fe2dc7fb6d7df07080d86",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2011-10-07T13:57:19Z",
    "title_canon_sha256": "31b2ffd067352c964a20967665d67d851aabb2ca2e3c58e6b84be3d4df1b0a7d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.1532",
    "kind": "arxiv",
    "version": 2
  }
}