Pith Number

pith:VIBPSTVU

pith:2015:VIBPSTVUFPUVJS7WJDJ3FCFTZS

not attested not anchored not stored refs pending

A Heat-Map-based Algorithm for Recognizing Group Activities in Videos

Bin Sheng, Hang Chu, Jianxin Wu, Weiyao Lin, Zhenzhong Chen

arxiv:1502.06076 v1 · 2015-02-21 · 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{VIBPSTVUFPUVJS7WJDJ3FCFTZS}

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	2026-05-18T00:57:50.998505Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa02f94eb42be954cbf648d3b288b3cca70ee1566d8713919e58e5d75d298dc5

Aliases

arxiv: 1502.06076 · arxiv_version: 1502.06076v1 · doi: 10.48550/arxiv.1502.06076 · pith_short_12: VIBPSTVUFPUV · pith_short_16: VIBPSTVUFPUVJS7W · pith_short_8: VIBPSTVU

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/VIBPSTVUFPUVJS7WJDJ3FCFTZS \
  | 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: aa02f94eb42be954cbf648d3b288b3cca70ee1566d8713919e58e5d75d298dc5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cab9dacf70d15bd1daa338a665d30847a347070003af2d0da9c91569fdbc22c5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-02-21T07:22:07Z",
    "title_canon_sha256": "122f2ac4ca89e270f41f731538a7bb3fe7814e96918230f02b469a0d4dec114e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.06076",
    "kind": "arxiv",
    "version": 1
  }
}