Pith Number

pith:ITQJ7ZH3

pith:2025:ITQJ7ZH35KP4Z76H35PTXVEIZD

not attested not anchored not stored refs pending

On the complexity of computing Strahler numbers

Markus Lohrey, Moses Ganardi

arxiv:2512.19060 v2 · 2025-12-22 · cs.CC · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ITQJ7ZH35KP4Z76H35PTXVEIZD}

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	2026-06-05T00:13:44.696490Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44e09fe4fbea9fccffc7df5f3bd488c8e3c3857fc99f31723f3428dd91f2bd7f

Aliases

arxiv: 2512.19060 · arxiv_version: 2512.19060v2 · doi: 10.48550/arxiv.2512.19060 · pith_short_12: ITQJ7ZH35KP4 · pith_short_16: ITQJ7ZH35KP4Z76H · pith_short_8: ITQJ7ZH3

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/ITQJ7ZH35KP4Z76H35PTXVEIZD \
  | 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: 44e09fe4fbea9fccffc7df5f3bd488c8e3c3857fc99f31723f3428dd91f2bd7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2cedc5014f9845a3b970fed8fadc7fdf8ddf4ae2188c9693d425d3645895e953",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2025-12-22T05:56:44Z",
    "title_canon_sha256": "64f333f3bf6a971e6aac91df898df24435901712444dba0ffe22ff4c8a0f935c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.19060",
    "kind": "arxiv",
    "version": 2
  }
}