Pith Number

pith:75AQ4Y6J

pith:2013:75AQ4Y6JKW4N5A2MHD4KLL3EUO

not attested not anchored not stored refs pending

Simplicial nerve of an A-infinity category

Giovanni Faonte

arxiv:1312.2127 v2 · 2013-12-07 · math.AT · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{75AQ4Y6JKW4N5A2MHD4KLL3EUO}

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	2026-05-18T00:51:19.304675Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff410e63c955b8de834c38f8a5af64a3a860e36460351e7e11bcc284b2d8a403

Aliases

arxiv: 1312.2127 · arxiv_version: 1312.2127v2 · doi: 10.48550/arxiv.1312.2127 · pith_short_12: 75AQ4Y6JKW4N · pith_short_16: 75AQ4Y6JKW4N5A2M · pith_short_8: 75AQ4Y6J

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/75AQ4Y6JKW4N5A2MHD4KLL3EUO \
  | 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: ff410e63c955b8de834c38f8a5af64a3a860e36460351e7e11bcc284b2d8a403

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61adaccd9663e401ae384322af2dd1e06043c032b969b1cccd7a4660c588ae08",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-12-07T19:09:48Z",
    "title_canon_sha256": "4af79515fd76323ad863d4aeb813b4df274f856918ea0bb345036880412ef039"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.2127",
    "kind": "arxiv",
    "version": 2
  }
}