Pith Number

pith:YGPSDYY5

pith:2019:YGPSDYY5QPYXSZWIBYC4W7DXLD

not attested not anchored not stored refs pending

Combating the Filter Bubble: Designing for Serendipity in a University Course Recommendation System

Weijie Jiang, Zachary A. Pardos

arxiv:1907.01591 v1 · 2019-07-02 · cs.IR · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YGPSDYY5QPYXSZWIBYC4W7DXLD}

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	2026-05-17T23:41:35.845532Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c19f21e31d83f17966c80e05cb7c7758ecdc9e49302eca70c3068795cb994242

Aliases

arxiv: 1907.01591 · arxiv_version: 1907.01591v1 · doi: 10.48550/arxiv.1907.01591 · pith_short_12: YGPSDYY5QPYX · pith_short_16: YGPSDYY5QPYXSZWI · pith_short_8: YGPSDYY5

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/YGPSDYY5QPYXSZWIBYC4W7DXLD \
  | 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: c19f21e31d83f17966c80e05cb7c7758ecdc9e49302eca70c3068795cb994242

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "681dde8df502e85658854e5e7afff617ef48f8c99d8807f7ab47225e1151931d",
    "cross_cats_sorted": [
      "cs.CY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2019-07-02T19:17:43Z",
    "title_canon_sha256": "338ac36eae3613bfb77f3f36d6313c24f8384ca471ec5f31ed5f8bc1296153de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.01591",
    "kind": "arxiv",
    "version": 1
  }
}