Pith Number

pith:N53T2B7I

pith:2026:N53T2B7IJM7KUP6H5SFLHP5MIM

not attested not anchored not stored refs pending

Optimization of the directed spanning trees using the weighted matroid intersection algorithm

Binhong Jiang, Gehao Wang

arxiv:2607.25238 v1 · 2026-07-28 · cs.DS · 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{N53T2B7IJM7KUP6H5SFLHP5MIM}

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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	2026-07-29T00:25:10.197516Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f773d07e84b3eaa3fc7ec8ab3bfac433cbe25dac0efd179c57af96971758f63

Aliases

arxiv: 2607.25238 · arxiv_version: 2607.25238v1 · doi: 10.48550/arxiv.2607.25238 · pith_short_12: N53T2B7IJM7K · pith_short_16: N53T2B7IJM7KUP6H · pith_short_8: N53T2B7I

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/N53T2B7IJM7KUP6H5SFLHP5MIM \
  | 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: 6f773d07e84b3eaa3fc7ec8ab3bfac433cbe25dac0efd179c57af96971758f63

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54201c0fc1d3b330385ae480da46a8b9af6f778b53d9b7408c5670e748a6a292",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2026-07-28T03:28:16Z",
    "title_canon_sha256": "39683e68475ae65045b9e08b6b8128b2fb5ca52b9e8ece7246553a5fdb93a448"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.25238",
    "kind": "arxiv",
    "version": 1
  }
}