Pith Number

pith:2KYLQWVV

pith:2013:2KYLQWVVFS4OSR65ETH5KWMHKF

not attested not anchored not stored refs pending

Moderate smoothness of most Alexandrov surfaces

Costin Vilcu, Jin-ichi Itoh, Joel Rouyer

arxiv:1308.3862 v2 · 2013-08-18 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2KYLQWVVFS4OSR65ETH5KWMHKF}

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	2026-05-18T02:51:42.153604Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2b0b85ab52cb8e947dd24cfd5598751591cb7be78089c589a0878982dc6df81

Aliases

arxiv: 1308.3862 · arxiv_version: 1308.3862v2 · doi: 10.48550/arxiv.1308.3862 · pith_short_12: 2KYLQWVVFS4O · pith_short_16: 2KYLQWVVFS4OSR65 · pith_short_8: 2KYLQWVV

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/2KYLQWVVFS4OSR65ETH5KWMHKF \
  | 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: d2b0b85ab52cb8e947dd24cfd5598751591cb7be78089c589a0878982dc6df81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ee6fcb0822ad21c8355515bc6e6b74eaadbf0980fe9f274053bd96006ddfc05",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2013-08-18T14:42:39Z",
    "title_canon_sha256": "21b1be60fa2383aec95bc22cd256980e1552dcc0a5552b2a1c7679ffc00a0992"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.3862",
    "kind": "arxiv",
    "version": 2
  }
}