Pith Number

pith:VQ7SE2R3

pith:2018:VQ7SE2R3VDHFX32U2PZDQ54U2X

not attested not anchored not stored refs pending

Non-removability of the Sierpinski Gasket

Dimitrios Ntalampekos

arxiv:1804.10239 v2 · 2018-04-26 · math.MG · math.CA · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VQ7SE2R3VDHFX32U2PZDQ54U2X}

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	2026-05-17T23:44:00.204596Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac3f226a3ba8ce5bef54d3f2387794d5fbe23d5e80e8362ff803fcfa4f8d646e

Aliases

arxiv: 1804.10239 · arxiv_version: 1804.10239v2 · doi: 10.48550/arxiv.1804.10239 · pith_short_12: VQ7SE2R3VDHF · pith_short_16: VQ7SE2R3VDHFX32U · pith_short_8: VQ7SE2R3

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/VQ7SE2R3VDHFX32U2PZDQ54U2X \
  | 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: ac3f226a3ba8ce5bef54d3f2387794d5fbe23d5e80e8362ff803fcfa4f8d646e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11032feca5dcd3e498d23752a39c85f0290c17eb91575739112f46299aa014b0",
    "cross_cats_sorted": [
      "math.CA",
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2018-04-26T18:34:59Z",
    "title_canon_sha256": "20ad68f6482abbbe86621b402fe60bfabeeccaa1d4d22f34df1e9b7eb666760b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.10239",
    "kind": "arxiv",
    "version": 2
  }
}