Pith Number

pith:SLJ4PRT6

pith:2025:SLJ4PRT6DJDACWUXMULQ6CJ6CS

not attested not anchored not stored refs pending

Improved Bounds for Codes over Trees

Tingting Chen, Wenjie Zhong, Xiande Zhang, Yanzhi Li

arxiv:2504.06556 v1 · 2025-04-09 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SLJ4PRT6DJDACWUXMULQ6CJ6CS}

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	2026-07-05T10:46:28.893692Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92d3c7c67e1a46015a9765170f093e14adbe509d6737f5258bd8123739a6f4a8

Aliases

arxiv: 2504.06556 · arxiv_version: 2504.06556v1 · doi: 10.48550/arxiv.2504.06556 · pith_short_12: SLJ4PRT6DJDA · pith_short_16: SLJ4PRT6DJDACWUX · pith_short_8: SLJ4PRT6

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/SLJ4PRT6DJDACWUXMULQ6CJ6CS \
  | 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: 92d3c7c67e1a46015a9765170f093e14adbe509d6737f5258bd8123739a6f4a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "133eb4a3cc2de68650c243e0e90c36bcfd522195fc339179ceb008d34d0f684b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2025-04-09T03:35:21Z",
    "title_canon_sha256": "0c0aaee6f3cc6ed656661cbdefb20a22d993c35f2c7bc65b6af6bd89fddd567c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.06556",
    "kind": "arxiv",
    "version": 1
  }
}