Pith Number

pith:GZ4N4R42

pith:2012:GZ4N4R42B5KPTSXVJQTFY57ZXZ

not attested not anchored not stored refs pending

Unsupervised Activity Discovery and Characterization From Event-Streams

Aaron Bobick, Amos Johnson, Charles Lee Isbell, Irfan Essa, Rafay Hammid, Siddhartha Maddi

arxiv:1207.1381 v1 · 2012-07-04 · 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{GZ4N4R42B5KPTSXVJQTFY57ZXZ}

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	2026-05-18T03:51:37.503677Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3678de479a0f54f9caf54c265c77f9be68510121b0b429fd1df081ce99e39c93

Aliases

arxiv: 1207.1381 · arxiv_version: 1207.1381v1 · doi: 10.48550/arxiv.1207.1381 · pith_short_12: GZ4N4R42B5KP · pith_short_16: GZ4N4R42B5KPTSXV · pith_short_8: GZ4N4R42

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/GZ4N4R42B5KPTSXVJQTFY57ZXZ \
  | 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: 3678de479a0f54f9caf54c265c77f9be68510121b0b429fd1df081ce99e39c93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f6a43ba06ace2fc34ba6a1338a9b4be1f4338edf61f757828cd2eee3d5bfa50b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2012-07-04T16:10:35Z",
    "title_canon_sha256": "c6da5eed78f33c545b4610588dbdb4fba5697fbd6de1090805f6ab6e8355db6d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.1381",
    "kind": "arxiv",
    "version": 1
  }
}