Pith Number

pith:UM4Q47ML

pith:2021:UM4Q47MLFSDP4C25QJJINS7DSJ

not attested not anchored not stored refs pending

SparseBERT: Rethinking the Importance Analysis in Self-attention

Hang Xu, Han Shi, James T. Kwok, Jiahui Gao, Xiaodan Liang, Xiaozhe Ren, Zhenguo Li

arxiv:2102.12871 v3 · 2021-02-25 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UM4Q47MLFSDP4C25QJJINS7DSJ}

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	2026-07-05T02:54:16.530925Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3390e7d8b2c86fe0b5d825286cbe39272b29e4bfce79f4be90ffd6b67d411ef

Aliases

arxiv: 2102.12871 · arxiv_version: 2102.12871v3 · doi: 10.48550/arxiv.2102.12871 · pith_short_12: UM4Q47MLFSDP · pith_short_16: UM4Q47MLFSDP4C25 · pith_short_8: UM4Q47ML

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/UM4Q47MLFSDP4C25QJJINS7DSJ \
  | 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: a3390e7d8b2c86fe0b5d825286cbe39272b29e4bfce79f4be90ffd6b67d411ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17147c6617c007e67798e41589ae09435c2369619a260369b696d6beb328a890",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2021-02-25T14:13:44Z",
    "title_canon_sha256": "ee95cad9243e4eaf52f575d6dcf46e8ff1e303f74de63e184e507d7c7c84913e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.12871",
    "kind": "arxiv",
    "version": 3
  }
}