Pith Number

pith:SY7QLMOH

pith:2026:SY7QLMOH3XM52FHBRFIPODJOHC

not attested not anchored not stored refs pending

Nearly Instance Optimal Sparse Matrix Approximation from Matrix-Vector Products

Christoper Musco, Indu Ramesh

arxiv:2606.12179 v1 · 2026-06-10 · cs.DS · cs.NA · 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{SY7QLMOH3XM52FHBRFIPODJOHC}

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	2026-06-11T01:10:52.700476Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

963f05b1c7ddd9dd14e18950f70d2e38a3e6aebea437cab4afb7bd055d914657

Aliases

arxiv: 2606.12179 · arxiv_version: 2606.12179v1 · doi: 10.48550/arxiv.2606.12179 · pith_short_12: SY7QLMOH3XM5 · pith_short_16: SY7QLMOH3XM52FHB · pith_short_8: SY7QLMOH

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/SY7QLMOH3XM52FHBRFIPODJOHC \
  | 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: 963f05b1c7ddd9dd14e18950f70d2e38a3e6aebea437cab4afb7bd055d914657

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e45237ad5577695aa53704c8c869797761158728fb0d9b835111527ba9215401",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2026-06-10T15:04:46Z",
    "title_canon_sha256": "0fde4166bfb5bae4d47227e9cf10cdf5db022b53f8151230dd6c7c99c26db24e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.12179",
    "kind": "arxiv",
    "version": 1
  }
}