Pith Number

pith:UZGFKVO6

pith:2017:UZGFKVO6HXBDA4DD5GVFL5LQNG

not attested not anchored not stored refs pending

Tverberg-type theorems for matroids: A counterexample and a proof

Albert Haase, G\"unter M. Ziegler, Pavle V. M. Blagojevi\'c

arxiv:1705.03624 v1 · 2017-05-10 · math.CO · math.AT · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UZGFKVO6HXBDA4DD5GVFL5LQNG}

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	2026-05-18T00:44:43.412913Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a64c5555de3dc2307063e9aa55f5706982dd0f24b905d0821189338fb6c68e77

Aliases

arxiv: 1705.03624 · arxiv_version: 1705.03624v1 · doi: 10.48550/arxiv.1705.03624 · pith_short_12: UZGFKVO6HXBD · pith_short_16: UZGFKVO6HXBDA4DD · pith_short_8: UZGFKVO6

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/UZGFKVO6HXBDA4DD5GVFL5LQNG \
  | 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: a64c5555de3dc2307063e9aa55f5706982dd0f24b905d0821189338fb6c68e77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4c41cf027b076b895b54cdb3d4a320af7931f56ee85e9bffd8e6ad0fb3b7fec3",
    "cross_cats_sorted": [
      "math.AT",
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-05-10T06:49:19Z",
    "title_canon_sha256": "703e8c53dd7b263c19b1860b4214cfd6458f3b7c27f98c1d8657a6cc652c4397"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.03624",
    "kind": "arxiv",
    "version": 1
  }
}