Pith Number

pith:QCRFGOU5

pith:2019:QCRFGOU5RBDCMTIIKBHQTHFPKA

not attested not anchored not stored refs pending

Grade prediction with course and student specific models

Agoritsa Polyzou, George Karypis

arxiv:1906.00792 v1 · 2019-05-30 · 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{QCRFGOU5RBDCMTIIKBHQTHFPKA}

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	2026-05-17T23:44:23.906043Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80a2533a9d8846264d08504f099caf50349182e776e22f5a55271403d259b711

Aliases

arxiv: 1906.00792 · arxiv_version: 1906.00792v1 · doi: 10.48550/arxiv.1906.00792 · pith_short_12: QCRFGOU5RBDC · pith_short_16: QCRFGOU5RBDCMTII · pith_short_8: QCRFGOU5

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/QCRFGOU5RBDCMTIIKBHQTHFPKA \
  | 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: 80a2533a9d8846264d08504f099caf50349182e776e22f5a55271403d259b711

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b4a5ca87d8adc3474cdb47b2d4af9fd15113c9a7106f7768d238c942bef1c096",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2019-05-30T23:38:45Z",
    "title_canon_sha256": "623f9bb02176a4b1d701ceefa590c553f70348a6456a9184ac4ce4a6831f9909"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.00792",
    "kind": "arxiv",
    "version": 1
  }
}