Pith Number

pith:PXQQY7VZ

pith:2011:PXQQY7VZXE5GXKTLYOXEBFSQD2

not attested not anchored not stored refs pending

On Sets of Lines Not-Supporting Trees

Daniel Neuwirth, Radoslav Fulek

arxiv:1104.1307 v8 · 2011-04-07 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PXQQY7VZXE5GXKTLYOXEBFSQD2}

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	2026-05-18T02:22:10.555195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7de10c7eb9b93a6baa6bc3ae4096501eae74040bc77ced174f3a54c7a7f4b8ab

Aliases

arxiv: 1104.1307 · arxiv_version: 1104.1307v8 · doi: 10.48550/arxiv.1104.1307 · pith_short_12: PXQQY7VZXE5G · pith_short_16: PXQQY7VZXE5GXKTL · pith_short_8: PXQQY7VZ

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/PXQQY7VZXE5GXKTLYOXEBFSQD2 \
  | 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: 7de10c7eb9b93a6baa6bc3ae4096501eae74040bc77ced174f3a54c7a7f4b8ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd1dc9b41f7c5325af715fac5c3a88b40ca55ca227733b774e5779f7b7160801",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2011-04-07T11:56:39Z",
    "title_canon_sha256": "1f68f7eab8b0d0ae571d4abb5e05b23b1ba79a0d32f9457e9873330e46d9e979"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1307",
    "kind": "arxiv",
    "version": 8
  }
}