Pith Number

pith:U4QQBEIG

pith:2013:U4QQBEIGYXTWNINVNX2WMP5NHY

not attested not anchored not stored refs pending

Towards Using Unlabeled Data in a Sparse-coding Framework for Human Activity Recognition

Nils Hammerla, Petteri Nurmi, Sourav Bhattacharya, Thomas Pl\"otz

arxiv:1312.6995 v3 · 2013-12-25 · cs.LG · cs.AI · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U4QQBEIGYXTWNINVNX2WMP5NHY}

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	2026-05-18T02:47:05.541643Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a721009106c5e766a1b56df5663fad3e114b8253189f8f4a7f6cfdb45e730b8e

Aliases

arxiv: 1312.6995 · arxiv_version: 1312.6995v3 · doi: 10.48550/arxiv.1312.6995 · pith_short_12: U4QQBEIGYXTW · pith_short_16: U4QQBEIGYXTWNINV · pith_short_8: U4QQBEIG

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/U4QQBEIGYXTWNINVNX2WMP5NHY \
  | 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: a721009106c5e766a1b56df5663fad3e114b8253189f8f4a7f6cfdb45e730b8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0a9775d6be546e5db7f807fa48dcc16f25e8f61f8dff50a60aeac5c94122184",
    "cross_cats_sorted": [
      "cs.AI",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-12-25T18:08:44Z",
    "title_canon_sha256": "a313d64e1c56ee3190be8e7368c8e513e6cf2692f3e78fd497c31d276ce5b14a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.6995",
    "kind": "arxiv",
    "version": 3
  }
}