Pith Number

pith:GGYQC7SV

pith:2016:GGYQC7SVF2IR3LIM6GYXKDMP3W

not attested not anchored not stored refs pending

Iterating evolutes of spatial polygons and of spatial curves

Dmitry Fuchs, Serge Tabachnikov

arxiv:1611.08836 v4 · 2016-11-27 · math.DG · 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{GGYQC7SVF2IR3LIM6GYXKDMP3W}

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	2026-05-18T00:46:18.776363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31b1017e552e911dad0cf1b1750d8fddb9459a7db405eee8318f01982a7491d3

Aliases

arxiv: 1611.08836 · arxiv_version: 1611.08836v4 · doi: 10.48550/arxiv.1611.08836 · pith_short_12: GGYQC7SVF2IR · pith_short_16: GGYQC7SVF2IR3LIM · pith_short_8: GGYQC7SV

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/GGYQC7SVF2IR3LIM6GYXKDMP3W \
  | 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: 31b1017e552e911dad0cf1b1750d8fddb9459a7db405eee8318f01982a7491d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e08988550314eaa487158e33688c94f67885f23a180bf0e9fd67e27f9d4e54cf",
    "cross_cats_sorted": [
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2016-11-27T12:58:07Z",
    "title_canon_sha256": "c53485846644da6888603b21a7aa372158a7eab4a33f76259f06bab4b17eadce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.08836",
    "kind": "arxiv",
    "version": 4
  }
}