Pith Number

pith:AUPGXQX3

pith:2021:AUPGXQX33JM5GHAAQJ6WJAFKJN

not attested not anchored not stored refs pending

Observers Pupillary Responses in Recognising Real and Posed Smiles: A Preliminary Study

Atiqul Islam, Md Zakir Hossain, Ruiqi Chen, Tom Gedeon

arxiv:2102.03994 v1 · 2021-02-08 · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AUPGXQX33JM5GHAAQJ6WJAFKJN}

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	2026-07-05T02:13:28.912685Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

051e6bc2fbda59d31c00827d6480aa4b5f20cf511b608acc3818750198700a73

Aliases

arxiv: 2102.03994 · arxiv_version: 2102.03994v1 · doi: 10.48550/arxiv.2102.03994 · pith_short_12: AUPGXQX33JM5 · pith_short_16: AUPGXQX33JM5GHAA · pith_short_8: AUPGXQX3

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/AUPGXQX33JM5GHAAQJ6WJAFKJN \
  | 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: 051e6bc2fbda59d31c00827d6480aa4b5f20cf511b608acc3818750198700a73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c25716cba6cfef29f00d4ea1ab78cce1e9974f247b85d5c057ffc0812e0a6d8d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2021-02-08T04:07:04Z",
    "title_canon_sha256": "3340f819c94326c24b5b10bd9c4f3f2beac0e93714c6eb083336cd1aa5beae66"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.03994",
    "kind": "arxiv",
    "version": 1
  }
}