Pith Number

pith:BAHHSWJZ

pith:2019:BAHHSWJZ4ZZTU7ILPNN4WJDAOU

not attested not anchored not stored refs pending

On the Rotational Invariant $L_1$-Norm PCA

Gabriele Steidl, Max Nimmer, Sebastian Neumayer, Simon Setzer

arxiv:1902.03840 v2 · 2019-02-11 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BAHHSWJZ4ZZTU7ILPNN4WJDAOU}

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	2026-05-17T23:45:14.873966Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

080e795939e6733a7d0b7b5bcb24607534154e4e0a9ac4b08ed1cb4c1c55a622

Aliases

arxiv: 1902.03840 · arxiv_version: 1902.03840v2 · doi: 10.48550/arxiv.1902.03840 · pith_short_12: BAHHSWJZ4ZZT · pith_short_16: BAHHSWJZ4ZZTU7IL · pith_short_8: BAHHSWJZ

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/BAHHSWJZ4ZZTU7ILPNN4WJDAOU \
  | 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: 080e795939e6733a7d0b7b5bcb24607534154e4e0a9ac4b08ed1cb4c1c55a622

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e2c2d4d847de9af3aeb01d35565e061cab711644c1f8357e3000ff7dcca47a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-02-11T12:14:36Z",
    "title_canon_sha256": "271cab70c12a344cceefdeca3721449d9d9f8a4b5149f8b23596a6a9378d02b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.03840",
    "kind": "arxiv",
    "version": 2
  }
}