Pith Number

pith:NBDJCUR4

pith:2013:NBDJCUR4EZZUJLXHQZWD5F5CSQ

not attested not anchored not stored refs pending

Optimal Locally Repairable Codes and Connections to Matroid Theory

Alexandros G. Dimakis, Dimitris S. Papailiopoulos, Itzhak Tamo

arxiv:1301.7693 v3 · 2013-01-31 · 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{NBDJCUR4EZZUJLXHQZWD5F5CSQ}

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	2026-05-18T03:07:54.786400Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

684691523c267344aee7866c3e97a2943af97bcfcc4efa5d63f40a2b5d92b4ff

Aliases

arxiv: 1301.7693 · arxiv_version: 1301.7693v3 · doi: 10.48550/arxiv.1301.7693 · pith_short_12: NBDJCUR4EZZU · pith_short_16: NBDJCUR4EZZUJLXH · pith_short_8: NBDJCUR4

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/NBDJCUR4EZZUJLXHQZWD5F5CSQ \
  | 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: 684691523c267344aee7866c3e97a2943af97bcfcc4efa5d63f40a2b5d92b4ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ab5f07536dd8650aab8514904f506ab5759c070f2791d5c0d5dbbad42d30671",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-01-31T17:23:10Z",
    "title_canon_sha256": "850211335189acfee1e37926a6fe893d4e54540ad8e550f66067e66078f5140b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.7693",
    "kind": "arxiv",
    "version": 3
  }
}