Pith Number

pith:XEASPPQN

pith:2016:XEASPPQNXNADQCV2B6V3KPNSMZ

not attested not anchored not stored refs pending

On Moore-Penrose ideals

Steffen Roch

arxiv:1601.03546 v1 · 2016-01-14 · math.OA · 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{XEASPPQNXNADQCV2B6V3KPNSMZ}

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	2026-05-18T01:22:53.188225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b90127be0dbb40380aba0fabb53db26642adfa2bff35a3094857ab37295aee1c

Aliases

arxiv: 1601.03546 · arxiv_version: 1601.03546v1 · doi: 10.48550/arxiv.1601.03546 · pith_short_12: XEASPPQNXNAD · pith_short_16: XEASPPQNXNADQCV2 · pith_short_8: XEASPPQN

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/XEASPPQNXNADQCV2B6V3KPNSMZ \
  | 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: b90127be0dbb40380aba0fabb53db26642adfa2bff35a3094857ab37295aee1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2be6d38f919a082a8e04c035a8ccb3b2b1d3f944d9e9c689376fd6d91607ad2",
    "cross_cats_sorted": [
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2016-01-14T10:33:21Z",
    "title_canon_sha256": "7051c385c01a3c3e0b3113702b7e5fe626d338f2e4bd1f2c850b98a5899d7d2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.03546",
    "kind": "arxiv",
    "version": 1
  }
}