Pith Number

pith:IJOPYBUP

pith:2008:IJOPYBUPY7XAKBZV3XXR6HNUIC

not attested not anchored not stored refs pending

Random Search Algorithms for the Sparse Null Vector Problem

Hans Engler

arxiv:0804.3411 v1 · 2008-04-21 · math.NA · cs.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{IJOPYBUPY7XAKBZV3XXR6HNUIC}

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	2026-06-03T22:06:05.728475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

425cfc068fc7ee050735ddef1f1db440adefd85daa0c8014fa32a8d3d6abbaee

Aliases

arxiv: 0804.3411 · arxiv_version: 0804.3411v1 · doi: 10.48550/arxiv.0804.3411 · pith_short_12: IJOPYBUPY7XA · pith_short_16: IJOPYBUPY7XAKBZV · pith_short_8: IJOPYBUP

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/IJOPYBUPY7XAKBZV3XXR6HNUIC \
  | 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: 425cfc068fc7ee050735ddef1f1db440adefd85daa0c8014fa32a8d3d6abbaee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e35185cbf244c6cc1a9665002f88a216e3a7aee0d45a43b90ef3fdf634d892e",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2008-04-21T22:13:02Z",
    "title_canon_sha256": "32b989c4142e64cb5ba7384df4ba277a068455a7affb20ff89e0de7b402d3e32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3411",
    "kind": "arxiv",
    "version": 1
  }
}