Pith Number

pith:YPKFR5YY

pith:2013:YPKFR5YYKWTW6XYIFCR3S4QQ2F

not attested not anchored not stored refs pending

Sketching Sparse Matrices

Badri Narayan Bhaskar, Gautam Dasarathy, Parikshit Shah, Robert Nowak

arxiv:1303.6544 v1 · 2013-03-26 · cs.IT · math.IT · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YPKFR5YYKWTW6XYIFCR3S4QQ2F}

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	2026-05-18T03:29:49.090198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3d458f71855a76f5f0828a3b97210d1629c4ad4da3009767f8c103adf8816dd

Aliases

arxiv: 1303.6544 · arxiv_version: 1303.6544v1 · doi: 10.48550/arxiv.1303.6544 · pith_short_12: YPKFR5YYKWTW · pith_short_16: YPKFR5YYKWTW6XYI · pith_short_8: YPKFR5YY

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/YPKFR5YYKWTW6XYIFCR3S4QQ2F \
  | 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: c3d458f71855a76f5f0828a3b97210d1629c4ad4da3009767f8c103adf8816dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afe8586c31b62a4d331175495027b3fc9932036fb8bea5941d89190dc56f9be7",
    "cross_cats_sorted": [
      "math.IT",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-03-26T16:23:23Z",
    "title_canon_sha256": "0e958911e636e545ec0fd2140542ee6c4f46284fc09012b3f116b449388a6541"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.6544",
    "kind": "arxiv",
    "version": 1
  }
}