Pith Number

pith:TGMGIOTQ

pith:2016:TGMGIOTQPAHR65U4P6LKFJSYWX

not attested not anchored not stored refs pending

Sparse pseudoinverses via LP and SDP relaxations of Moore-Penrose

Jon Lee, Marcia Fampa, Victor K. Fuentes

arxiv:1606.06969 v1 · 2016-06-22 · 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{TGMGIOTQPAHR65U4P6LKFJSYWX}

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	2026-05-18T01:12:00.815036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9998643a70780f1f769c7f96a2a658b5fea71055e29c0b5ba0644836cbb52dad

Aliases

arxiv: 1606.06969 · arxiv_version: 1606.06969v1 · doi: 10.48550/arxiv.1606.06969 · pith_short_12: TGMGIOTQPAHR · pith_short_16: TGMGIOTQPAHR65U4 · pith_short_8: TGMGIOTQ

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/TGMGIOTQPAHR65U4P6LKFJSYWX \
  | 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: 9998643a70780f1f769c7f96a2a658b5fea71055e29c0b5ba0644836cbb52dad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7cb0acb4dc1ccce6be062a128cc5c7e0b0b38179cd15f64875d0f274741ea6c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-06-22T14:56:31Z",
    "title_canon_sha256": "b227968c9496bbf21c39bd9eec18e1a7f42d4b7cff84513683be3c184347bbe4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.06969",
    "kind": "arxiv",
    "version": 1
  }
}