Pith Number

pith:EJ52C4SL

pith:2012:EJ52C4SLXJH2PHI3VMOGEOWZZA

not attested not anchored not stored refs pending

On the connectivity of finite subset spaces

Jacob Mostovoy, Rustam Sadykov

arxiv:1203.5180 v2 · 2012-03-23 · math.AT · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EJ52C4SLXJH2PHI3VMOGEOWZZA}

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	2026-05-18T03:56:44.755792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

227ba1724bba4fa79d1bab1c623ad9c80502eba205e009d29dd3e4dcd054eaaa

Aliases

arxiv: 1203.5180 · arxiv_version: 1203.5180v2 · doi: 10.48550/arxiv.1203.5180 · pith_short_12: EJ52C4SLXJH2 · pith_short_16: EJ52C4SLXJH2PHI3 · pith_short_8: EJ52C4SL

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/EJ52C4SLXJH2PHI3VMOGEOWZZA \
  | 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: 227ba1724bba4fa79d1bab1c623ad9c80502eba205e009d29dd3e4dcd054eaaa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "114d35debc767efa9583926a96ae7f59c7ab0971946b3a34d7f915e607ad421c",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2012-03-23T05:59:18Z",
    "title_canon_sha256": "6be9a0795c0ac8be46717cc7fadfedd2cf31fd3068c5a554dd27eda6d5a7deef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.5180",
    "kind": "arxiv",
    "version": 2
  }
}