Pith Number

pith:N5SF54MR

pith:2019:N5SF54MRJCXPYSGHXKX5UJ7GJQ

not attested not anchored not stored refs pending

Spectral sparsification of matrix inputs as a preprocessing step for quantum algorithms

Sathyawageeswar Subramanian, Steven Herbert

arxiv:1910.02861 v1 · 2019-10-07 · quant-ph · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N5SF54MRJCXPYSGHXKX5UJ7GJQ}

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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.

Cited by

1 paper in Pith

Testing the presence of balanced and bipartite components in a sparse graph is QMA1-hard

Receipt and verification

First computed	2026-07-05T00:10:12.155366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f645ef19148aefc48c7baafda27e64c1952ae5d4e1e8349bbcbb46b60d07363

Aliases

arxiv: 1910.02861 · arxiv_version: 1910.02861v1 · doi: 10.48550/arxiv.1910.02861 · pith_short_12: N5SF54MRJCXP · pith_short_16: N5SF54MRJCXPYSGH · pith_short_8: N5SF54MR

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/N5SF54MRJCXPYSGHXKX5UJ7GJQ \
  | 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: 6f645ef19148aefc48c7baafda27e64c1952ae5d4e1e8349bbcbb46b60d07363

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2be0393166d64a5d4b130bd90ca8d0b1ff3c4ca163dfe0740fb0c33bbc1c4d98",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-10-07T15:40:36Z",
    "title_canon_sha256": "346204c74dd43881d02a6514350e8bd25188398ace1b5b669d1a0ceb7ebf8885"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1910.02861",
    "kind": "arxiv",
    "version": 1
  }
}