Pith Number

pith:GWQKKSEO

pith:2015:GWQKKSEO3KKGGVBECMZYJY4Q7A

not attested not anchored not stored refs pending

Approximating leading singular triplets of a matrix function

Sarah W. Gaaf, Valeria Simoncini

arxiv:1505.03453 v1 · 2015-05-13 · 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{GWQKKSEO3KKGGVBECMZYJY4Q7A}

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	2026-05-18T02:12:01.279348Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

35a0a5488eda94635424133384e390f8000f94bc0c5ab359ca66acc30b91634f

Aliases

arxiv: 1505.03453 · arxiv_version: 1505.03453v1 · doi: 10.48550/arxiv.1505.03453 · pith_short_12: GWQKKSEO3KKG · pith_short_16: GWQKKSEO3KKGGVBE · pith_short_8: GWQKKSEO

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/GWQKKSEO3KKGGVBECMZYJY4Q7A \
  | 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: 35a0a5488eda94635424133384e390f8000f94bc0c5ab359ca66acc30b91634f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5c06245d09004bc8574fe495647cb938b7527c9c05b08c9bdf947a2efece32f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-05-13T16:45:25Z",
    "title_canon_sha256": "f1efda31323972e4e686636513759eb6da096faf5c3d660cfa30829f81f3e1d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.03453",
    "kind": "arxiv",
    "version": 1
  }
}