Pith Number

pith:F2VR5DYN

pith:2019:F2VR5DYNVT5WKDID3D7AWRALA3

not attested not anchored not stored refs pending

Efficient nuclear norm approximation via the randomized UTV algorithm

Nathan Heavner, Per-Gunnar Martinsson

arxiv:1903.11543 v1 · 2019-03-27 · 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{F2VR5DYNVT5WKDID3D7AWRALA3}

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	2026-05-17T23:50:03.012225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2eab1e8f0dacfb650d03d8fe0b440b06da39ae66d5fad0b25b90b52e0e316c8e

Aliases

arxiv: 1903.11543 · arxiv_version: 1903.11543v1 · doi: 10.48550/arxiv.1903.11543 · pith_short_12: F2VR5DYNVT5W · pith_short_16: F2VR5DYNVT5WKDID · pith_short_8: F2VR5DYN

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/F2VR5DYNVT5WKDID3D7AWRALA3 \
  | 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: 2eab1e8f0dacfb650d03d8fe0b440b06da39ae66d5fad0b25b90b52e0e316c8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0aaa27113a38e678a5c22e38df03056e76e91f12da1fb9a39c3719cd36ffaf63",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-03-27T16:53:43Z",
    "title_canon_sha256": "77e298d8fccb80687fa7752d202efb07683859a3cdbfc4ff57c70b68857074c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.11543",
    "kind": "arxiv",
    "version": 1
  }
}