Pith Number

pith:SKINPNIE

pith:2016:SKINPNIECO3U5GUX2QKUZU2QEN

not attested not anchored not stored refs pending

Helicoidal flat surfaces in the 3-sphere

Fernando Manfio, Jo\~ao Paulo dos Santos

arxiv:1601.04930 v1 · 2016-01-19 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SKINPNIECO3U5GUX2QKUZU2QEN}

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	2026-05-18T01:22:31.528338Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9290d7b50413b74e9a97d4154cd3502373616dea7510acd0c5ad6e22d9ffe785

Aliases

arxiv: 1601.04930 · arxiv_version: 1601.04930v1 · doi: 10.48550/arxiv.1601.04930 · pith_short_12: SKINPNIECO3U · pith_short_16: SKINPNIECO3U5GUX · pith_short_8: SKINPNIE

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/SKINPNIECO3U5GUX2QKUZU2QEN \
  | 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: 9290d7b50413b74e9a97d4154cd3502373616dea7510acd0c5ad6e22d9ffe785

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cbedb4e3605f117d4954aea7d04b0c10dbc730cb98984d4ee331132acdb0d1c9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-01-19T14:21:25Z",
    "title_canon_sha256": "820b4ba1461e271bcebf89c2f28b8d2600a91f1b681c25a0f15af8ca28984a00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.04930",
    "kind": "arxiv",
    "version": 1
  }
}