Pith Number

pith:4NIOZX6D

pith:2016:4NIOZX6DIVKDWS22AZS5KQFYIV

not attested not anchored not stored refs pending

Fixed-point algorithms for frequency estimation and structured low rank approximation

Fredrik Andersson, Marcus Carlsson

arxiv:1601.01242 v1 · 2016-01-06 · 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{4NIOZX6DIVKDWS22AZS5KQFYIV}

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	2026-05-18T01:23:17.440960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e350ecdfc345543b4b5a0665d540b8455444cbb51054ba58e8e9f3c137da8e65

Aliases

arxiv: 1601.01242 · arxiv_version: 1601.01242v1 · doi: 10.48550/arxiv.1601.01242 · pith_short_12: 4NIOZX6DIVKD · pith_short_16: 4NIOZX6DIVKDWS22 · pith_short_8: 4NIOZX6D

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/4NIOZX6DIVKDWS22AZS5KQFYIV \
  | 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: e350ecdfc345543b4b5a0665d540b8455444cbb51054ba58e8e9f3c137da8e65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c21b44ac081d5b8e9f7104abd77e4b7411908c4107b16e697b0f52f57c7a9dfb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-01-06T17:18:26Z",
    "title_canon_sha256": "36f29b9755a82f9cb3bc9f7806e1db4d92ca789613a34b8d324e475a5f199181"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.01242",
    "kind": "arxiv",
    "version": 1
  }
}