Pith Number

pith:4PWH5CA2

pith:2018:4PWH5CA2EJ62HQFMJU5OCII2FZ

not attested not anchored not stored refs pending

Randomized QLP algorithm and error analysis

Hua Xiang, Nianci Wu

arxiv:1811.09334 v1 · 2018-11-23 · 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{4PWH5CA2EJ62HQFMJU5OCII2FZ}

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	2026-05-18T00:00:03.663534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3ec7e881a227da3c0ac4d3ae1211a2e7bee52307a15c041640f19d81cb247d3

Aliases

arxiv: 1811.09334 · arxiv_version: 1811.09334v1 · doi: 10.48550/arxiv.1811.09334 · pith_short_12: 4PWH5CA2EJ62 · pith_short_16: 4PWH5CA2EJ62HQFM · pith_short_8: 4PWH5CA2

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/4PWH5CA2EJ62HQFMJU5OCII2FZ \
  | 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: e3ec7e881a227da3c0ac4d3ae1211a2e7bee52307a15c041640f19d81cb247d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a6532b88bf8c4f9da9853e13ab8c280789eddd027ba21a7d65082967703c4c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-11-23T01:03:24Z",
    "title_canon_sha256": "f3497f343b585282e6ae8af853297fe25c1c05c459d5c58d3f5bd43c07a88c2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.09334",
    "kind": "arxiv",
    "version": 1
  }
}