Pith Number

pith:MQLDYDAR

pith:2011:MQLDYDARYMUZGGRICLXVSI6QS4

not attested not anchored not stored refs pending

Fast approximation of matrix coherence and statistical leverage

David P. Woodruff, Malik Magdon-Ismail, Michael W. Mahoney, Petros Drineas

arxiv:1109.3843 v2 · 2011-09-18 · cs.DS · cs.DM · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MQLDYDARYMUZGGRICLXVSI6QS4}

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	2026-05-18T03:39:14.710000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64163c0c11c329931a2812ef5923d097029ce39ef3d5886a7669166740558ca4

Aliases

arxiv: 1109.3843 · arxiv_version: 1109.3843v2 · doi: 10.48550/arxiv.1109.3843 · pith_short_12: MQLDYDARYMUZ · pith_short_16: MQLDYDARYMUZGGRI · pith_short_8: MQLDYDAR

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/MQLDYDARYMUZGGRICLXVSI6QS4 \
  | 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: 64163c0c11c329931a2812ef5923d097029ce39ef3d5886a7669166740558ca4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f11a711cf20a690cf49aa0a4d3011d1c6f28a4f020d7e249ab2f70a9de6dcce6",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-09-18T04:38:12Z",
    "title_canon_sha256": "ca7f1b88b646beda0529c7542fea2b2d8000cb4f1d5fec27e349553ccd3b38a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.3843",
    "kind": "arxiv",
    "version": 2
  }
}