Pith Number

pith:ID7ECL5A

pith:2011:ID7ECL5AH77SSFUSF4P6TSV7FR

not attested not anchored not stored refs pending

On Truncated-SVD-like Sparse Solutions to Least-Squares Problems of Arbitrary Dimensions

Christos Boutsidis

arxiv:1201.0073 v2 · 2011-12-30 · cs.DS · 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{ID7ECL5AH77SSFUSF4P6TSV7FR}

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	2026-05-18T02:38:44.784054Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

40fe412fa03fff2916922f1fe9cabf2c4a2b4d913f404083396e10a705e018ac

Aliases

arxiv: 1201.0073 · arxiv_version: 1201.0073v2 · doi: 10.48550/arxiv.1201.0073 · pith_short_12: ID7ECL5AH77S · pith_short_16: ID7ECL5AH77SSFUS · pith_short_8: ID7ECL5A

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/ID7ECL5AH77SSFUSF4P6TSV7FR \
  | 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: 40fe412fa03fff2916922f1fe9cabf2c4a2b4d913f404083396e10a705e018ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "edd6ad8ec5f26cb54636aa6c7953c0df2c758cff1531c93262974d08012bd8a8",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-12-30T06:38:56Z",
    "title_canon_sha256": "3e46f16cc327a3fe2c536f71fe971ff1ac59e9a1bc5efc90f22a62c11ce3eb94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0073",
    "kind": "arxiv",
    "version": 2
  }
}