Pith Number

pith:VM7ZSUOG

pith:2021:VM7ZSUOGPAP3K3MHQUVUSYJUA7

not attested not anchored not stored refs pending

Teaching a Massive Open Online Course on Natural Language Processing

Denis Kirjanov, Ekaterina Artemova, Murat Apishev, Oleg Serikov, Sergey Aksenov, Veronika Sarkisyan

arxiv:2104.12846 v2 · 2021-04-26 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VM7ZSUOGPAP3K3MHQUVUSYJUA7}

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	2026-07-05T06:56:27.815373Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab3f9951c6781fb56d87852b49613407ea2cc7254e75ba62c7b3c747d36b82fc

Aliases

arxiv: 2104.12846 · arxiv_version: 2104.12846v2 · doi: 10.48550/arxiv.2104.12846 · pith_short_12: VM7ZSUOGPAP3 · pith_short_16: VM7ZSUOGPAP3K3MH · pith_short_8: VM7ZSUOG

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/VM7ZSUOGPAP3K3MHQUVUSYJUA7 \
  | 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: ab3f9951c6781fb56d87852b49613407ea2cc7254e75ba62c7b3c747d36b82fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b569d280bbf902a9ad42be03def234a5af34d411bed6219cf54da1135eda8ed",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-04-26T19:52:00Z",
    "title_canon_sha256": "dd9568f59c1afefb946ff8ab1a005d58a25322d2c5f2ccc18407985e1136bd41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.12846",
    "kind": "arxiv",
    "version": 2
  }
}