Pith Number

pith:CDPF5GR2

pith:2018:CDPF5GR2ZOTS3TBCXDW2COVFLU

not attested not anchored not stored refs pending

How long can optimal locally repairable codes be?

Chaoping Xing, Chen Yuan, Venkatesan Guruswami

arxiv:1807.01064 v1 · 2018-07-03 · cs.IT · cs.CC · 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{CDPF5GR2ZOTS3TBCXDW2COVFLU}

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	2026-05-18T00:11:45.497552Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10de5e9a3acba72dcc22b8eda13aa55d218b34a96cbf7d3360b409249b8165ab

Aliases

arxiv: 1807.01064 · arxiv_version: 1807.01064v1 · doi: 10.48550/arxiv.1807.01064 · pith_short_12: CDPF5GR2ZOTS · pith_short_16: CDPF5GR2ZOTS3TBC · pith_short_8: CDPF5GR2

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/CDPF5GR2ZOTS3TBCXDW2COVFLU \
  | 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: 10de5e9a3acba72dcc22b8eda13aa55d218b34a96cbf7d3360b409249b8165ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f84fc57b59202ba4221c20692a09734575d328c0ac25a58374987e6948be57b4",
    "cross_cats_sorted": [
      "cs.CC",
      "math.CO",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2018-07-03T10:13:09Z",
    "title_canon_sha256": "bd3815440db62311a13f4024f331adc4d5bc30dd90d8c0ccb10d9165e24c467c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.01064",
    "kind": "arxiv",
    "version": 1
  }
}