Pith Number

pith:FHGUIUCQ

pith:2018:FHGUIUCQ653D24TGQYHBZT4GND

not attested not anchored not stored refs pending

Fast Parallel Randomized QR with Column Pivoting Algorithms for Reliable Low-rank Matrix Approximations

Jianwei Xiao, Julien Langou, Ming Gu

arxiv:1804.05138 v1 · 2018-04-13 · 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{FHGUIUCQ653D24TGQYHBZT4GND}

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	2026-05-18T00:18:30.475494Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29cd445050f7763d7266860e1ccf8668ebf9047b12dbe3d7ab76ea21bedd9df5

Aliases

arxiv: 1804.05138 · arxiv_version: 1804.05138v1 · doi: 10.48550/arxiv.1804.05138 · pith_short_12: FHGUIUCQ653D · pith_short_16: FHGUIUCQ653D24TG · pith_short_8: FHGUIUCQ

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/FHGUIUCQ653D24TGQYHBZT4GND \
  | 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: 29cd445050f7763d7266860e1ccf8668ebf9047b12dbe3d7ab76ea21bedd9df5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "529b7f26ef48e703029fa6aed8f7098f5a558ebe8cc768f48d6a14c63fa5a06f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-04-13T23:54:00Z",
    "title_canon_sha256": "7938cf1f20c09eabc971636888a88bf78b148655e7fea2695e46c64278cbf1d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.05138",
    "kind": "arxiv",
    "version": 1
  }
}