Pith Number

pith:2VJPD2U2

pith:2016:2VJPD2U2DZYZ5XERRZU2GOGFPW

not attested not anchored not stored refs pending

A counterexample to the reconstruction conjecture for locally finite trees

Florian Lehner, Joshua Erde, Max Pitz, Nathan Bowler, Peter Heinig

arxiv:1606.02926 v2 · 2016-06-09 · 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{2VJPD2U2DZYZ5XERRZU2GOGFPW}

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	2026-05-18T00:25:39.814896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d552f1ea9a1e719edc918e69a338c57db13f1d54d72564bde2c2d64f8917b6d8

Aliases

arxiv: 1606.02926 · arxiv_version: 1606.02926v2 · doi: 10.48550/arxiv.1606.02926 · pith_short_12: 2VJPD2U2DZYZ · pith_short_16: 2VJPD2U2DZYZ5XER · pith_short_8: 2VJPD2U2

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/2VJPD2U2DZYZ5XERRZU2GOGFPW \
  | 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: d552f1ea9a1e719edc918e69a338c57db13f1d54d72564bde2c2d64f8917b6d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ffdb689cee82f910b3ae0cb1f737a043a493f03b9070916c02c3fd9aaca37ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-06-09T12:08:15Z",
    "title_canon_sha256": "bf89607f5f98eb034de902f33148bf916f20b976f216fcca069fc8a1c301b768"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.02926",
    "kind": "arxiv",
    "version": 2
  }
}