Pith Number

pith:QGUCTXB6

pith:2014:QGUCTXB6DZUEIOK7SK5E4CTY2I

not attested not anchored not stored refs pending

Sylvester-Gallai for Arrangements of Subspaces

Guangda Hu, Zeev Dvir

arxiv:1412.0795 v1 · 2014-12-02 · math.CO · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QGUCTXB6DZUEIOK7SK5E4CTY2I}

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	2026-05-18T02:32:21.191236Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81a829dc3e1e6844395f92ba4e0a78d22efe0c1bff97ee47972a8e6d73e938f2

Aliases

arxiv: 1412.0795 · arxiv_version: 1412.0795v1 · doi: 10.48550/arxiv.1412.0795 · pith_short_12: QGUCTXB6DZUE · pith_short_16: QGUCTXB6DZUEIOK7 · pith_short_8: QGUCTXB6

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/QGUCTXB6DZUEIOK7SK5E4CTY2I \
  | 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: 81a829dc3e1e6844395f92ba4e0a78d22efe0c1bff97ee47972a8e6d73e938f2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1bd19bda5c6d3378f0cdd6b1cabd9565ff61e69077bcd5fd1d3ca0b88d776fd",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-12-02T06:47:44Z",
    "title_canon_sha256": "b5a18e5aadb120c73f3a2d5cc3d6bfe0dabbb657b0952055c161b198de2ded09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.0795",
    "kind": "arxiv",
    "version": 1
  }
}