Pith Number

pith:LETLD5S4

pith:2025:LETLD5S4Y7TRJHUV7NFDYZQ5FN

not attested not anchored not stored refs pending

Self-affine quadrangles

Christian Richter, Felix Zimmermann

arxiv:2502.15521 v2 · 2025-02-21 · math.CO · 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{LETLD5S4Y7TRJHUV7NFDYZQ5FN}

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	2026-05-25T02:01:02.412271Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5926b1f65cc7e7149e95fb4a3c661d2b57be7c432e217038a754482ef55307a5

Aliases

arxiv: 2502.15521 · arxiv_version: 2502.15521v2 · doi: 10.48550/arxiv.2502.15521 · pith_short_12: LETLD5S4Y7TR · pith_short_16: LETLD5S4Y7TRJHUV · pith_short_8: LETLD5S4

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/LETLD5S4Y7TRJHUV7NFDYZQ5FN \
  | 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: 5926b1f65cc7e7149e95fb4a3c661d2b57be7c432e217038a754482ef55307a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4729e2f8f98cc9643318bf27b7f4af1378ff472a50468cb8f682d864c280c9c",
    "cross_cats_sorted": [
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2025-02-21T15:22:50Z",
    "title_canon_sha256": "1d6d2859c3524f16ca76a352f28f5eec57e39f3f1db7f95d11b3b407d2b58eb1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.15521",
    "kind": "arxiv",
    "version": 2
  }
}