Pith Number

pith:ZMSFVY5P

pith:2018:ZMSFVY5PVT5GBFVJYH6JF3FRFI

not attested not anchored not stored refs pending

On the classification of 1-connected 7-manifolds with torsion free second homology

Matthias Kreck

arxiv:1805.02391 v1 · 2018-05-07 · 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{ZMSFVY5PVT5GBFVJYH6JF3FRFI}

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	2026-05-18T00:11:34.027254Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb245ae3afacfa6096a9c1fc92ecb12a263260ffc7c95c5e536b93fbd4398808

Aliases

arxiv: 1805.02391 · arxiv_version: 1805.02391v1 · doi: 10.48550/arxiv.1805.02391 · pith_short_12: ZMSFVY5PVT5G · pith_short_16: ZMSFVY5PVT5GBFVJ · pith_short_8: ZMSFVY5P

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/ZMSFVY5PVT5GBFVJYH6JF3FRFI \
  | 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: cb245ae3afacfa6096a9c1fc92ecb12a263260ffc7c95c5e536b93fbd4398808

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f12f567280176fa5d3319acd5ae84ca00c70d11891fc6ba390233340957c46b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2018-05-07T08:02:52Z",
    "title_canon_sha256": "522d5c3c75a2c329fecabeb5c6c22b6af6be92c1298ebbf45104144e80923167"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.02391",
    "kind": "arxiv",
    "version": 1
  }
}