Pith Number

pith:57XGTUNB

pith:2014:57XGTUNB3UZRIALCGHRCOBXE5P

not attested not anchored not stored refs pending

Fractional repetition codes with flexible repair from combinatorial designs

Aditya Ramamoorthy, Oktay Olmez

arxiv:1408.5780 v2 · 2014-08-25 · 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{57XGTUNB3UZRIALCGHRCOBXE5P}

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	2026-05-18T01:21:13.793901Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

efee69d1a1dd3314016231e22706e4ebcf0cdb6ed95f523759a0e48836e98cfe

Aliases

arxiv: 1408.5780 · arxiv_version: 1408.5780v2 · doi: 10.48550/arxiv.1408.5780 · pith_short_12: 57XGTUNB3UZR · pith_short_16: 57XGTUNB3UZRIALC · pith_short_8: 57XGTUNB

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/57XGTUNB3UZRIALCGHRCOBXE5P \
  | 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: efee69d1a1dd3314016231e22706e4ebcf0cdb6ed95f523759a0e48836e98cfe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "964c5e4c24a6af36cd94f83f7f6a199108df07a489efd05405ca1a83d509a95f",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-08-25T14:52:00Z",
    "title_canon_sha256": "2faca2ad3c58523f9552f4014ffeda3f45d414b8693fca749d86a83bb7bc7e51"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.5780",
    "kind": "arxiv",
    "version": 2
  }
}