Pith Number

pith:IEQENFSM

pith:2013:IEQENFSMJES2LBUVOBZOCCBZAG

not attested not anchored not stored refs pending

Max-min and min-max approximation problems for normal matrices revisited

J\"org Liesen, Petr Tich\'y

arxiv:1310.5880 v1 · 2013-10-22 · 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{IEQENFSMJES2LBUVOBZOCCBZAG}

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	2026-05-18T03:09:24.364629Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

412046964c4925a586957072e1083901957fb26814565f0af9cde77a4b98e339

Aliases

arxiv: 1310.5880 · arxiv_version: 1310.5880v1 · doi: 10.48550/arxiv.1310.5880 · pith_short_12: IEQENFSMJES2 · pith_short_16: IEQENFSMJES2LBUV · pith_short_8: IEQENFSM

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/IEQENFSMJES2LBUVOBZOCCBZAG \
  | 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: 412046964c4925a586957072e1083901957fb26814565f0af9cde77a4b98e339

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7663029ec1d2692dc550087876d2c6dec804f35bffc8614b46b93db1a6f3fbb4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-10-22T11:23:28Z",
    "title_canon_sha256": "8f17049c58b1ad8016e4b0d3f32a9d0641fc4c62cb6c215288da45d7ff6cceee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.5880",
    "kind": "arxiv",
    "version": 1
  }
}