Pith Number

pith:LXY3WPCO

pith:2012:LXY3WPCOCWVSDVCKKW6T7MOUFO

not attested not anchored not stored refs pending

Answering n^{2+o(1)} Counting Queries with Differential Privacy is Hard

Jonathan Ullman

arxiv:1207.6945 v3 · 2012-07-30 · cs.CR · 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{LXY3WPCOCWVSDVCKKW6T7MOUFO}

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	2026-05-18T03:11:47.159131Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5df1bb3c4e15ab21d44a55bd3fb1d42bb37e1ccbf9623bb34373efa244414821

Aliases

arxiv: 1207.6945 · arxiv_version: 1207.6945v3 · doi: 10.48550/arxiv.1207.6945 · pith_short_12: LXY3WPCOCWVS · pith_short_16: LXY3WPCOCWVSDVCK · pith_short_8: LXY3WPCO

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/LXY3WPCOCWVSDVCKKW6T7MOUFO \
  | 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: 5df1bb3c4e15ab21d44a55bd3fb1d42bb37e1ccbf9623bb34373efa244414821

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "93dc05772d5113527823d1c54a2e834ccd8d312409b5d8fc21db6957a9d67e05",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2012-07-30T14:34:26Z",
    "title_canon_sha256": "78137f6a0fef467b285e146c0e42f6a078b265c12c52c541c9ea27c1ab3629e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.6945",
    "kind": "arxiv",
    "version": 3
  }
}