Pith Number

pith:RD3YJEDI

pith:2018:RD3YJEDIWSBPSBOSC423JQEXAQ

not attested not anchored not stored refs pending

On Sparse Reflexive Generalized Inverses

Jon Lee, Marcia Fampa

arxiv:1807.03074 v2 · 2018-07-09 · math.OC · cs.CC · cs.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{RD3YJEDIWSBPSBOSC423JQEXAQ}

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	2026-05-18T00:04:29.614602Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88f7849068b482f905d21735b4c097041b65314b39d77f84ab82b0d19ad08a43

Aliases

arxiv: 1807.03074 · arxiv_version: 1807.03074v2 · doi: 10.48550/arxiv.1807.03074 · pith_short_12: RD3YJEDIWSBP · pith_short_16: RD3YJEDIWSBPSBOS · pith_short_8: RD3YJEDI

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/RD3YJEDIWSBPSBOSC423JQEXAQ \
  | 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: 88f7849068b482f905d21735b4c097041b65314b39d77f84ab82b0d19ad08a43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c174c6b083d14a5eb8ee1dc16adaf284cc88db0f3f48c5eca049af6037e83afe",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-07-09T12:33:36Z",
    "title_canon_sha256": "42bb5476bb75cace73fb8fb045cba271c5f5f003e46e77aabf351f33040ab2be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.03074",
    "kind": "arxiv",
    "version": 2
  }
}