Pith Number

pith:SSR3WH5C

pith:2016:SSR3WH5CH5OS7MZF3KROA3DJSM

not attested not anchored not stored refs pending

On Some Universally Good Fractional Repetition Codes

Manish K. Gupta, Shreyansh A. Prajapati

arxiv:1609.03106 v1 · 2016-09-11 · 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{SSR3WH5CH5OS7MZF3KROA3DJSM}

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	2026-05-18T01:04:47.760752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94a3bb1fa23f5d2fb325daa2e06c69932487ba99ad1e8a99e14671d3b4e561d8

Aliases

arxiv: 1609.03106 · arxiv_version: 1609.03106v1 · doi: 10.48550/arxiv.1609.03106 · pith_short_12: SSR3WH5CH5OS · pith_short_16: SSR3WH5CH5OS7MZF · pith_short_8: SSR3WH5C

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/SSR3WH5CH5OS7MZF3KROA3DJSM \
  | 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: 94a3bb1fa23f5d2fb325daa2e06c69932487ba99ad1e8a99e14671d3b4e561d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53580a2e93ce7bba7044cad9cae38b1bb480dcc19f1936cb7806ea2f4f36b48f",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2016-09-11T01:12:44Z",
    "title_canon_sha256": "933228a59fc495e468f708ce03c5a5ef631489dea42ab3931083c90476163e2d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.03106",
    "kind": "arxiv",
    "version": 1
  }
}