Pith Number

pith:BUR5CIUA

pith:2012:BUR5CIUAO2SEWGWDI64OLYGMGG

not attested not anchored not stored refs pending

Are You Imitating Me? Unsupervised Sparse Modeling for Group Activity Analysis from a Single Video

Alexey Castrodad, Guillermo Sapiro, Mariano Tepper, Zhongwei Tang

arxiv:1208.5451 v1 · 2012-08-27 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BUR5CIUAO2SEWGWDI64OLYGMGG}

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	2026-05-18T03:46:59.438682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d23d1228076a44b1ac347b8e5e0cc318da4d4d7fa13ba6f9b46796eb752e7c7

Aliases

arxiv: 1208.5451 · arxiv_version: 1208.5451v1 · doi: 10.48550/arxiv.1208.5451 · pith_short_12: BUR5CIUAO2SE · pith_short_16: BUR5CIUAO2SEWGWD · pith_short_8: BUR5CIUA

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/BUR5CIUAO2SEWGWDI64OLYGMGG \
  | 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: 0d23d1228076a44b1ac347b8e5e0cc318da4d4d7fa13ba6f9b46796eb752e7c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e09d48d53cb6096bc096ba654e37213878b0dd3c94d57c559bb876779fb2c9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2012-08-27T17:21:39Z",
    "title_canon_sha256": "0e8b949b34cc1be7e59b79e814682e7ecd837679acffc2f250036115f89ffc60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.5451",
    "kind": "arxiv",
    "version": 1
  }
}