Pith Number

pith:3FDOQISF

pith:2012:3FDOQISFBBCTALEQSN32DBGHLA

not attested not anchored not stored refs pending

Coverings of small categories and nerves

Kazunori Noguchi

arxiv:1210.5678 v1 · 2012-10-21 · math.CT · 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{3FDOQISFBBCTALEQSN32DBGHLA}

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	2026-05-18T03:42:43.341912Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d946e822450845302c909377a184c75804b145137ad0cd325d520a5639907568

Aliases

arxiv: 1210.5678 · arxiv_version: 1210.5678v1 · doi: 10.48550/arxiv.1210.5678 · pith_short_12: 3FDOQISFBBCT · pith_short_16: 3FDOQISFBBCTALEQ · pith_short_8: 3FDOQISF

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/3FDOQISFBBCTALEQSN32DBGHLA \
  | 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: d946e822450845302c909377a184c75804b145137ad0cd325d520a5639907568

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f14c08e1a132a3bd622380330f4535f0653a0afcae16b66d70d76d2c2cebd58a",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2012-10-21T02:56:00Z",
    "title_canon_sha256": "9b63caff6224fde57478f06fa7b820b59067b01293eb31c35582f0732cbd5059"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.5678",
    "kind": "arxiv",
    "version": 1
  }
}