Pith Number

pith:LPVKCSQU

pith:2021:LPVKCSQUFWM3NFXJPHNLKMQUIF

not attested not anchored not stored refs pending

Iterative Hierarchical Attention for Answering Complex Questions over Long Documents

Haitian Sun, Ruslan Salakhutdinov, William W. Cohen

arxiv:2106.00200 v2 · 2021-06-01 · cs.CL · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LPVKCSQUFWM3NFXJPHNLKMQUIF}

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	2026-07-05T03:24:43.061563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5beaa14a142d99b696e979dab5321441603045245fbfcdda6ecb0ad9cfc104f0

Aliases

arxiv: 2106.00200 · arxiv_version: 2106.00200v2 · doi: 10.48550/arxiv.2106.00200 · pith_short_12: LPVKCSQUFWM3 · pith_short_16: LPVKCSQUFWM3NFXJ · pith_short_8: LPVKCSQU

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/LPVKCSQUFWM3NFXJPHNLKMQUIF \
  | 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: 5beaa14a142d99b696e979dab5321441603045245fbfcdda6ecb0ad9cfc104f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ad08405849c681a4903ee1a631b277da058b66eb1dfdeb40993b352f9c89a95",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-06-01T03:13:35Z",
    "title_canon_sha256": "5b5e455f3296f4334405af2c40ef5e0b2e379e9bb043fd796e091f14215053fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.00200",
    "kind": "arxiv",
    "version": 2
  }
}