Pith Number

pith:5RLNHB2W

pith:2011:5RLNHB2WIOL7VASEIRH24ELUPN

not attested not anchored not stored refs pending

Optimal Indexes for Sparse Bit Vectors

Alessio Orlandi, Alexander Golynski, Rajeev Raman, S. Srinivasa Rao

arxiv:1108.2157 v1 · 2011-08-10 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5RLNHB2WIOL7VASEIRH24ELUPN}

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	2026-05-18T02:21:42.346302Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec56d387564397fa8244444fae11747b70887af7d0127ed41c39e3a990c65115

Aliases

arxiv: 1108.2157 · arxiv_version: 1108.2157v1 · doi: 10.48550/arxiv.1108.2157 · pith_short_12: 5RLNHB2WIOL7 · pith_short_16: 5RLNHB2WIOL7VASE · pith_short_8: 5RLNHB2W

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/5RLNHB2WIOL7VASEIRH24ELUPN \
  | 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: ec56d387564397fa8244444fae11747b70887af7d0127ed41c39e3a990c65115

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b848d4517f7cfc78cbaa3bf6b174183e1b74d72d7116c2dad90531095a97b164",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-08-10T11:36:22Z",
    "title_canon_sha256": "6e40a77e3eac2c955bc5b2bec85310c963eacd504adcba4dceaf7a86a5a6fa8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.2157",
    "kind": "arxiv",
    "version": 1
  }
}