Pith Number

pith:U5NBSMO5

pith:2012:U5NBSMO5WANGUXUPMSDPQDYMJX

not attested not anchored not stored refs pending

Quasi-cyclic Flexible Regenerating Codes

Bernat Gast\'on, Jaume Pujol, Merc\`e Villanueva

arxiv:1209.3977 v2 · 2012-09-18 · cs.IT · cs.DC · 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{U5NBSMO5WANGUXUPMSDPQDYMJX}

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	2026-05-18T03:25:35.001165Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a75a1931ddb01a6a5e8f6486f80f0c4dd12c6287494b878f6622425a4177cb25

Aliases

arxiv: 1209.3977 · arxiv_version: 1209.3977v2 · doi: 10.48550/arxiv.1209.3977 · pith_short_12: U5NBSMO5WANG · pith_short_16: U5NBSMO5WANGUXUP · pith_short_8: U5NBSMO5

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/U5NBSMO5WANGUXUPMSDPQDYMJX \
  | 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: a75a1931ddb01a6a5e8f6486f80f0c4dd12c6287494b878f6622425a4177cb25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3230ef6e04e90486f2789be2da26b6e0a4c20fcbd6f709c7d9b766441164bcc",
    "cross_cats_sorted": [
      "cs.DC",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-09-18T14:26:14Z",
    "title_canon_sha256": "a4f5d36e7943d801b14ecbda7a820cf865f79c22270fe1e76a74b54321037d3d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.3977",
    "kind": "arxiv",
    "version": 2
  }
}