Pith Number

pith:7CS4DCTZ

pith:2017:7CS4DCTZJ3SI6DUH4WFTYJFEZC

not attested not anchored not stored refs pending

Storage Capacity as an Information-Theoretic Vertex Cover and the Index Coding Rate

Andrew McGregor, Arya Mazumdar, Sofya Vorotnikova

arxiv:1706.09197 v3 · 2017-06-28 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7CS4DCTZJ3SI6DUH4WFTYJFEZC}

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	2026-05-17T23:58:08.813047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8a5c18a794ee48f0e87e58b3c24a4c8b16659fc100d14c229d1936760bf8473

Aliases

arxiv: 1706.09197 · arxiv_version: 1706.09197v3 · doi: 10.48550/arxiv.1706.09197 · pith_short_12: 7CS4DCTZJ3SI · pith_short_16: 7CS4DCTZJ3SI6DUH · pith_short_8: 7CS4DCTZ

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/7CS4DCTZJ3SI6DUH4WFTYJFEZC \
  | 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: f8a5c18a794ee48f0e87e58b3c24a4c8b16659fc100d14c229d1936760bf8473

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "422f66c34d97d4013a68990618cf48b6fd731ffdfdbfd67f55ca3661fb33c472",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2017-06-28T10:05:04Z",
    "title_canon_sha256": "170556678127a1eee4f3f977135d37c628265ba9ccc93bd9d35fe503a8b2b750"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.09197",
    "kind": "arxiv",
    "version": 3
  }
}