Pith Number

pith:4C4KLHK5

pith:2018:4C4KLHK5QLVJ3QA4V73JIIOFKS

not attested not anchored not stored refs pending

AFEL-REC: A Recommender System for Providing Learning Resource Recommendations in Social Learning Environments

Dieter Theiler, Dominik Kowald, Elisabeth Lex, Emanuel Lacic

arxiv:1808.04603 v1 · 2018-08-14 · cs.IR

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

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	2026-05-18T00:08:12.078632Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0b8a59d5d82ea9dc01caff69421c554a13ce26b0921ee8082740dd053e537bf

Aliases

arxiv: 1808.04603 · arxiv_version: 1808.04603v1 · doi: 10.48550/arxiv.1808.04603 · pith_short_12: 4C4KLHK5QLVJ · pith_short_16: 4C4KLHK5QLVJ3QA4 · pith_short_8: 4C4KLHK5

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/4C4KLHK5QLVJ3QA4V73JIIOFKS \
  | 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: e0b8a59d5d82ea9dc01caff69421c554a13ce26b0921ee8082740dd053e537bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf284e132e82ae46702c28a60f5b59b0b78de18d765e93ee16f252be2f39262d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2018-08-14T10:00:30Z",
    "title_canon_sha256": "3738e03019a08f543f82ae1a41f971ddb4319fe9dc08602023f46b17392d643b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.04603",
    "kind": "arxiv",
    "version": 1
  }
}