Pith Number

pith:R4LJGHPX

pith:2009:R4LJGHPXMTK57IVMD2FO2QXETP

not attested not anchored not stored refs pending

Algorithms and Hardness for Subspace Approximation

Amit Deshpande, Kasturi Varadarajan, Madhur Tulsiani, Nisheeth K. Vishnoi

arxiv:0912.1403 v2 · 2009-12-08 · cs.DS · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R4LJGHPXMTK57IVMD2FO2QXETP}

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	2026-05-18T04:32:19.598158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f16931df764d5dfa2ac1e8aed42e49bd37594dac1c8c3ced9baa876f57e9a07

Aliases

arxiv: 0912.1403 · arxiv_version: 0912.1403v2 · doi: 10.48550/arxiv.0912.1403 · pith_short_12: R4LJGHPXMTK5 · pith_short_16: R4LJGHPXMTK57IVM · pith_short_8: R4LJGHPX

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/R4LJGHPXMTK57IVMD2FO2QXETP \
  | 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: 8f16931df764d5dfa2ac1e8aed42e49bd37594dac1c8c3ced9baa876f57e9a07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36093c427a9edfcdf98bd24b883d52b5456d47dc819cb70e6c3dfc3a02067459",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2009-12-08T04:54:17Z",
    "title_canon_sha256": "7913dbcde2aee687c5842c57d5e1d6e0f0791bc7b1550a0fbd5eca3acfc54ebc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1403",
    "kind": "arxiv",
    "version": 2
  }
}