Pith Number

pith:FTU2CFW2

pith:2019:FTU2CFW2PG257YMNFAVLPCDK2M

not attested not anchored not stored refs pending

Variations of the eccentricity and their properties in trees

Hua Wang, Xiao-Dong Zhang, Ya-Hong Chen

arxiv:1901.10252 v1 · 2019-01-29 · 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{FTU2CFW2PG257YMNFAVLPCDK2M}

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	2026-05-17T23:55:15.741916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ce9a116da79b5dfe18d282ab7886ad30ed00a24ff5a14eaf4ad4a12e13c7776

Aliases

arxiv: 1901.10252 · arxiv_version: 1901.10252v1 · doi: 10.48550/arxiv.1901.10252 · pith_short_12: FTU2CFW2PG25 · pith_short_16: FTU2CFW2PG257YMN · pith_short_8: FTU2CFW2

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/FTU2CFW2PG257YMNFAVLPCDK2M \
  | 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: 2ce9a116da79b5dfe18d282ab7886ad30ed00a24ff5a14eaf4ad4a12e13c7776

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "434f7b874c6d961fad4a618472fa18ec86260a48c49f9a68f9fd78b57164786c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-01-29T12:30:16Z",
    "title_canon_sha256": "30d73e8f5652baa534a7169ff1c330d7ce3842d7249859ee725f9bd328e5c33b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.10252",
    "kind": "arxiv",
    "version": 1
  }
}