Pith Number

pith:6324OYDN

pith:2017:6324OYDNGQCRWALNVIZODQDUCR

not attested not anchored not stored refs pending

Operator least squares problems and Moore-Penrose inverses in Krein spaces

Alejandra Maestripieri, Maximiliano Contino, Stefania Marcantognini

arxiv:1711.08787 v1 · 2017-11-23 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6324OYDNGQCRWALNVIZODQDUCR}

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	2026-05-18T00:29:44.104380Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6f5c7606d34051b016daa32e1c074145120e32cb001c74aa33818d87e8f1211

Aliases

arxiv: 1711.08787 · arxiv_version: 1711.08787v1 · doi: 10.48550/arxiv.1711.08787 · pith_short_12: 6324OYDNGQCR · pith_short_16: 6324OYDNGQCRWALN · pith_short_8: 6324OYDN

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/6324OYDNGQCRWALNVIZODQDUCR \
  | 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: f6f5c7606d34051b016daa32e1c074145120e32cb001c74aa33818d87e8f1211

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6477edbc1d97d84254857760fd8572fdb1b4b26c97d91e906ee59f5419c68119",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2017-11-23T17:40:30Z",
    "title_canon_sha256": "edb4c1acb75dfe69171768af08f0e18ce64e63bac7b067f44dd8e478457fc2f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.08787",
    "kind": "arxiv",
    "version": 1
  }
}