Pith Number

pith:E2XUZ2PT

pith:2012:E2XUZ2PT64UI6NH4RSUEIQBKPY

not attested not anchored not stored refs pending

Density-based group testing

Bal\'azs Keszegh, D\'aniel Gerbner, D\"om\"ot\"or P\'alv\"olgyi, G\'abor Wiener

arxiv:1204.1464 v1 · 2012-04-06 · math.CO · 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{E2XUZ2PT64UI6NH4RSUEIQBKPY}

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	2026-05-18T03:58:25.512349Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

26af4ce9f3f7288f34fc8ca844402a7e13db7db3d643b74b1099939eecb6bb0e

Aliases

arxiv: 1204.1464 · arxiv_version: 1204.1464v1 · doi: 10.48550/arxiv.1204.1464 · pith_short_12: E2XUZ2PT64UI · pith_short_16: E2XUZ2PT64UI6NH4 · pith_short_8: E2XUZ2PT

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/E2XUZ2PT64UI6NH4RSUEIQBKPY \
  | 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: 26af4ce9f3f7288f34fc8ca844402a7e13db7db3d643b74b1099939eecb6bb0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0cf85a2aa99ddb953c45382f245d14059af5dfd8afd41a9d556a7b7088ed341",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-04-06T12:16:58Z",
    "title_canon_sha256": "40b6368f07ee81d284c6af1f2d70f67d418c6dac450caf42c10ed99d68954b95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1464",
    "kind": "arxiv",
    "version": 1
  }
}