Pith Number

pith:CAQCZU2R

pith:2013:CAQCZU2RMDCSHOZIXUBRZX5AE7

not attested not anchored not stored refs pending

Cohomological rigidity of oriented Hantzsche-Wendt manidolds

Andrzej Szczepanski, Jerzy Popko

arxiv:1303.2807 v3 · 2013-03-12 · 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{CAQCZU2RMDCSHOZIXUBRZX5AE7}

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	2026-05-18T01:03:12.257562Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10202cd35160c523bb28bd031cdfa027ef4e0a872ce099cf8f652ce743070ecb

Aliases

arxiv: 1303.2807 · arxiv_version: 1303.2807v3 · doi: 10.48550/arxiv.1303.2807 · pith_short_12: CAQCZU2RMDCS · pith_short_16: CAQCZU2RMDCSHOZI · pith_short_8: CAQCZU2R

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/CAQCZU2RMDCSHOZIXUBRZX5AE7 \
  | 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: 10202cd35160c523bb28bd031cdfa027ef4e0a872ce099cf8f652ce743070ecb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa9468bdb463fdebf70d8c3ebace57fc583d611926d14504deed599ea7c8ff6e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-03-12T08:43:24Z",
    "title_canon_sha256": "ac861fba54ade392de032419ab1c746e6b3ef5f11345b24c49c415380e8786cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2807",
    "kind": "arxiv",
    "version": 3
  }
}