Pith Number

pith:7QHQK44N

pith:2025:7QHQK44N7L5INAUPQBO7I7LDOP

not attested not anchored not stored refs pending

Smoothly slice knots with Alexander polynomial 1 and high unknotting number

Lukas Lewark

arxiv:2507.15592 v1 · 2025-07-21 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7QHQK44N7L5INAUPQBO7I7LDOP}

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	2026-07-05T11:40:39.599487Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc0f05738dfafa86828f805df47d6373de0925075d86651a239c2c335cde8382

Aliases

arxiv: 2507.15592 · arxiv_version: 2507.15592v1 · doi: 10.48550/arxiv.2507.15592 · pith_short_12: 7QHQK44N7L5I · pith_short_16: 7QHQK44N7L5INAUP · pith_short_8: 7QHQK44N

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/7QHQK44N7L5INAUPQBO7I7LDOP \
  | 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: fc0f05738dfafa86828f805df47d6373de0925075d86651a239c2c335cde8382

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c79c034e9e8619a322647bbbae75c091406e0e421bcabd74065257147c4a0d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2025-07-21T13:14:19Z",
    "title_canon_sha256": "af50a1b6844841432282da2abb5d5fca30fb7a2bd647166e6a5f75678e904b9d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.15592",
    "kind": "arxiv",
    "version": 1
  }
}