Pith Number

pith:Z3X5ENA3

pith:2015:Z3X5ENA3XJUENGWM5XS5HB6AQO

not attested not anchored not stored refs pending

N2SID: Nuclear Norm Subspace Identification

Anders Hansson, Michel Verhaegen

arxiv:1501.04495 v2 · 2015-01-19 · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z3X5ENA3XJUENGWM5XS5HB6AQO}

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	2026-05-18T00:55:04.469181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ceefd2341bba68469accede5d387c083a8c2bff85de15bc8caaa8cdbddf74d39

Aliases

arxiv: 1501.04495 · arxiv_version: 1501.04495v2 · doi: 10.48550/arxiv.1501.04495 · pith_short_12: Z3X5ENA3XJUE · pith_short_16: Z3X5ENA3XJUENGWM · pith_short_8: Z3X5ENA3

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/Z3X5ENA3XJUENGWM5XS5HB6AQO \
  | 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: ceefd2341bba68469accede5d387c083a8c2bff85de15bc8caaa8cdbddf74d39

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7412c11af13b25207f7ebc244afcec574f3d6c994372fbd260a4c3064098826b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2015-01-19T14:02:38Z",
    "title_canon_sha256": "9275af7dc8c3b6ada6e7f94000d49f073950dc18412c209e93c549089c301792"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.04495",
    "kind": "arxiv",
    "version": 2
  }
}