Pith Number

pith:R4HVLIYK

pith:2017:R4HVLIYKFPGVBQ62HCEBM2XW46

not attested not anchored not stored refs pending

A Fast Frequent Directions Algorithm for Low Rank Approximation

Dan Teng, Delin Chu

arxiv:1705.07140 v3 · 2017-05-19 · 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{R4HVLIYKFPGVBQ62HCEBM2XW46}

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	2026-05-18T00:03:57.010281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f0f55a30a2bcd50c3da3888166af6e7a2b07d325be52c845da6406a04a79be2

Aliases

arxiv: 1705.07140 · arxiv_version: 1705.07140v3 · doi: 10.48550/arxiv.1705.07140 · pith_short_12: R4HVLIYKFPGV · pith_short_16: R4HVLIYKFPGVBQ62 · pith_short_8: R4HVLIYK

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/R4HVLIYKFPGVBQ62HCEBM2XW46 \
  | 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: 8f0f55a30a2bcd50c3da3888166af6e7a2b07d325be52c845da6406a04a79be2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36df5eb0a1b77c96c72177313961318c95fb5512be00868f58ff1d9812d980f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-05-19T18:41:03Z",
    "title_canon_sha256": "7c8a3101aaa5e62e2396ad737d0392e8e68264580d8949dc3dd67b387ca39fba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.07140",
    "kind": "arxiv",
    "version": 3
  }
}