Pith Number

pith:MY3ZO7DV

pith:2017:MY3ZO7DVLMZY5OCUII7GTIFM6A

not attested not anchored not stored refs pending

Two circles and only a straightedge

Arseniy Akopyan, Roman Fedorov

arxiv:1709.02562 v2 · 2017-09-08 · math.MG · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MY3ZO7DVLMZY5OCUII7GTIFM6A}

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	2026-05-18T00:02:13.340540Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6637977c755b338eb854423e69a0acf01f248be185dbc52f40e653f510ba588e

Aliases

arxiv: 1709.02562 · arxiv_version: 1709.02562v2 · doi: 10.48550/arxiv.1709.02562 · pith_short_12: MY3ZO7DVLMZY · pith_short_16: MY3ZO7DVLMZY5OCU · pith_short_8: MY3ZO7DV

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/MY3ZO7DVLMZY5OCUII7GTIFM6A \
  | 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: 6637977c755b338eb854423e69a0acf01f248be185dbc52f40e653f510ba588e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cad73b7fc05ef6ce92d4990ab590de914907375ee5f78b5f62707a0b4927a153",
    "cross_cats_sorted": [
      "math.HO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2017-09-08T06:41:35Z",
    "title_canon_sha256": "458f01803e33fba2db9dcec1389c8396191f8025a846a0dcce53ba4f670d2fb5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.02562",
    "kind": "arxiv",
    "version": 2
  }
}