Pith Number

pith:Q6BRNZVC

pith:2009:Q6BRNZVCGSV4MGT7H3GWAK7NDP

not attested not anchored not stored refs pending

Bounding the radii of balls meeting every connected component of semi-algebraic sets

Marie-Francoise Roy, Saugata Basu

arxiv:0911.1340 v1 · 2009-11-06 · cs.SC · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q6BRNZVCGSV4MGT7H3GWAK7NDP}

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	2026-05-18T04:30:14.664353Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

878316e6a234abc61a7f3ecd602bed1befd92cc96efcaf0fecc79c8fe9c2e640

Aliases

arxiv: 0911.1340 · arxiv_version: 0911.1340v1 · doi: 10.48550/arxiv.0911.1340 · pith_short_12: Q6BRNZVCGSV4 · pith_short_16: Q6BRNZVCGSV4MGT7 · pith_short_8: Q6BRNZVC

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/Q6BRNZVCGSV4MGT7H3GWAK7NDP \
  | 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: 878316e6a234abc61a7f3ecd602bed1befd92cc96efcaf0fecc79c8fe9c2e640

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12f9f348bab0c4912f0bbf8bc63b1df0c747583d8a0aec7d0dcf29792e6d1d62",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SC",
    "submitted_at": "2009-11-06T19:53:54Z",
    "title_canon_sha256": "2bcf3d558749811351e2cd322bf56d2d07131adb3fb6abd40cc28a7b5b1e28ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1340",
    "kind": "arxiv",
    "version": 1
  }
}