Pith Number

pith:IWQ7A5WZ

pith:2018:IWQ7A5WZMVVMKR72R4PDS2Z3FC

not attested not anchored not stored refs pending

Planar non-formality of the little discs operad in characteristic two

Paolo Salvatore

arxiv:1807.11671 v2 · 2018-07-31 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IWQ7A5WZMVVMKR72R4PDS2Z3FC}

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	2026-05-18T00:01:23.186492Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45a1f076d9656ac547fa8f1e396b3b289311b29faa76860c6569d6dbc3ba85b8

Aliases

arxiv: 1807.11671 · arxiv_version: 1807.11671v2 · doi: 10.48550/arxiv.1807.11671 · pith_short_12: IWQ7A5WZMVVM · pith_short_16: IWQ7A5WZMVVMKR72 · pith_short_8: IWQ7A5WZ

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/IWQ7A5WZMVVMKR72R4PDS2Z3FC \
  | 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: 45a1f076d9656ac547fa8f1e396b3b289311b29faa76860c6569d6dbc3ba85b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5bf92ab09be80ceb64246806fd12b1f077875dff7bc6b9b5f9ba696020910888",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2018-07-31T05:52:12Z",
    "title_canon_sha256": "730c84755ac94c052315fb89258869fb5a9fcd7cf01f194c07ef069da571c96c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.11671",
    "kind": "arxiv",
    "version": 2
  }
}