Pith Number

pith:EDH5LCMS

pith:2017:EDH5LCMS3KYRQMQS3G3CKI2KYH

not attested not anchored not stored refs pending

On the complexity of non-orientable Seifert fibre spaces

Alessia Cattabriga, Michele Mulazzani, Sergei Matveev, Timur Nasybullov

arxiv:1704.06721 v4 · 2017-04-21 · 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{EDH5LCMS3KYRQMQS3G3CKI2KYH}

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	2026-05-18T00:22:33.388568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20cfd58992dab1183212d9b625234ac1e84ef394939369c120250d6ecae030ff

Aliases

arxiv: 1704.06721 · arxiv_version: 1704.06721v4 · doi: 10.48550/arxiv.1704.06721 · pith_short_12: EDH5LCMS3KYR · pith_short_16: EDH5LCMS3KYRQMQS · pith_short_8: EDH5LCMS

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/EDH5LCMS3KYRQMQS3G3CKI2KYH \
  | 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: 20cfd58992dab1183212d9b625234ac1e84ef394939369c120250d6ecae030ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aaa80e4c753769e7a52f64577f3b122c7bc072c4fbcd91513588b0d95c967ad5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2017-04-21T23:00:40Z",
    "title_canon_sha256": "a3aacac37cca4b41ce866acfd2694dabaaf5515bcd377d0718e4d3aa7e71d396"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.06721",
    "kind": "arxiv",
    "version": 4
  }
}