Pith Number

pith:HINIPLQE

pith:2014:HINIPLQETIO5KUTMJXCBHXEGTK

not attested not anchored not stored refs pending

The double of the doubles of Klein surfaces

Ana M. Porto, Antonio F. Costa, Paola Cristofori

arxiv:1404.0958 v2 · 2014-04-03 · math.GT · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HINIPLQETIO5KUTMJXCBHXEGTK}

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	2026-05-18T00:28:57.369715Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a1a87ae049a1dd5526c4dc413dc869aa2484f72a6b499d6d0204f8cad1058da

Aliases

arxiv: 1404.0958 · arxiv_version: 1404.0958v2 · doi: 10.48550/arxiv.1404.0958 · pith_short_12: HINIPLQETIO5 · pith_short_16: HINIPLQETIO5KUTM · pith_short_8: HINIPLQE

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/HINIPLQETIO5KUTMJXCBHXEGTK \
  | 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: 3a1a87ae049a1dd5526c4dc413dc869aa2484f72a6b499d6d0204f8cad1058da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0de584cb9379540cf395779e151a48b8959191edd78b59ee60910922ee597f1",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2014-04-03T15:14:28Z",
    "title_canon_sha256": "c57c70e48433b9d5f0db37fa832da6056a8b42110b42e8afdec3f32ac142955e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.0958",
    "kind": "arxiv",
    "version": 2
  }
}