Pith Number

pith:Q2LZZAW7

pith:2021:Q2LZZAW7PQWTRW5RJ5RHVJTL5X

not attested not anchored not stored refs pending

COVID-19 Named Entity Recognition for Vietnamese

Dat Quoc Nguyen, Mai Hoang Dao, Thinh Hung Truong

arxiv:2104.03879 v1 · 2021-04-08 · 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{Q2LZZAW7PQWTRW5RJ5RHVJTL5X}

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	2026-07-05T02:30:24.559956Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86979c82df7c2d38dbb14f627aa66bedda9a82c655fb01485c4380c848b0199b

Aliases

arxiv: 2104.03879 · arxiv_version: 2104.03879v1 · doi: 10.48550/arxiv.2104.03879 · pith_short_12: Q2LZZAW7PQWT · pith_short_16: Q2LZZAW7PQWTRW5R · pith_short_8: Q2LZZAW7

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/Q2LZZAW7PQWTRW5RJ5RHVJTL5X \
  | 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: 86979c82df7c2d38dbb14f627aa66bedda9a82c655fb01485c4380c848b0199b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da27202d7eb48ad76cadceab5477ef5170701f5d1de24a542e88a0be26805d9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-04-08T16:35:34Z",
    "title_canon_sha256": "4a8c141aaf7d9c47e28cca246213cc998d28c81c9d889284416e8efca981f42c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.03879",
    "kind": "arxiv",
    "version": 1
  }
}