Pith Number

pith:FG7F23ZF

pith:2019:FG7F23ZFILFYKHFASW6RNBF5QI

not attested not anchored not stored refs pending

Optimal Algorithm to Reconstruct a Tree from a Subtree Distance

Kazutoshi Ando, Takanori Maehara

arxiv:1902.08742 v1 · 2019-02-23 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FG7F23ZFILFYKHFASW6RNBF5QI}

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	2026-05-17T23:52:50.106051Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29be5d6f2542cb851ca095bd1684bd823426e118acc474f064f60329dedb51b9

Aliases

arxiv: 1902.08742 · arxiv_version: 1902.08742v1 · doi: 10.48550/arxiv.1902.08742 · pith_short_12: FG7F23ZFILFY · pith_short_16: FG7F23ZFILFYKHFA · pith_short_8: FG7F23ZF

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/FG7F23ZFILFYKHFASW6RNBF5QI \
  | 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: 29be5d6f2542cb851ca095bd1684bd823426e118acc474f064f60329dedb51b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24e943aa4608468e0d662745fbe7a83f744a4c44398f684ebfad94d7c73faf51",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-02-23T06:04:30Z",
    "title_canon_sha256": "2454da52f6d35a8a36595b15d95b3628a1ce83f129c51673ff1b5fba3c2fbe6d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.08742",
    "kind": "arxiv",
    "version": 1
  }
}