Pith Number

pith:ZRIJCNMN

pith:2010:ZRIJCNMNTRHLC3BEX2I5TVXCBC

not attested not anchored not stored refs pending

Index coding via linear programming

Anna Blasiak, Eyal Lubetzky, Robert Kleinberg

arxiv:1004.1379 v2 · 2010-04-08 · cs.IT · math.CO · 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{ZRIJCNMNTRHLC3BEX2I5TVXCBC}

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	2026-05-18T04:18:23.538224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc5091358d9c4eb16c24be91d9d6e208b2fd1f4dbfc53cafd48f87579e01894b

Aliases

arxiv: 1004.1379 · arxiv_version: 1004.1379v2 · doi: 10.48550/arxiv.1004.1379 · pith_short_12: ZRIJCNMNTRHL · pith_short_16: ZRIJCNMNTRHLC3BE · pith_short_8: ZRIJCNMN

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/ZRIJCNMNTRHLC3BEX2I5TVXCBC \
  | 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: cc5091358d9c4eb16c24be91d9d6e208b2fd1f4dbfc53cafd48f87579e01894b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f89de438ef4f84640bced67f1182e87a434da802d3c91ed6e966c6edc86805e",
    "cross_cats_sorted": [
      "math.CO",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2010-04-08T17:33:06Z",
    "title_canon_sha256": "bcf102ea011c084c3bbce3ff130c09c283c94031177ecff71afbf7aa25c91428"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.1379",
    "kind": "arxiv",
    "version": 2
  }
}