Pith Number

pith:24IRU2LV

pith:2012:24IRU2LVWVYFODQFU2E5J2AD3S

not attested not anchored not stored refs pending

Subspace System Identification via Weighted Nuclear Norm Optimization

Anders Hansson, Lieven Vandenberghe, Zhang Liu

arxiv:1207.0023 v1 · 2012-06-29 · 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{24IRU2LVWVYFODQFU2E5J2AD3S}

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	2026-05-18T00:57:56.879237Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7111a6975b570570e05a689d4e803dc82225e0c79da5bbf3820176e73eca40f

Aliases

arxiv: 1207.0023 · arxiv_version: 1207.0023v1 · doi: 10.48550/arxiv.1207.0023 · pith_short_12: 24IRU2LVWVYF · pith_short_16: 24IRU2LVWVYFODQF · pith_short_8: 24IRU2LV

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/24IRU2LVWVYFODQFU2E5J2AD3S \
  | 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: d7111a6975b570570e05a689d4e803dc82225e0c79da5bbf3820176e73eca40f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a04c2db5239cd2f45a134e5103fac22da694275ae60be9fc78384acbe9706b3b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2012-06-29T22:04:36Z",
    "title_canon_sha256": "70483e7c13933662b08a93e6bd9957516ce509f31cb82e66b5efbe98da9e199d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0023",
    "kind": "arxiv",
    "version": 1
  }
}