Pith Number

pith:U6DAVEJP

pith:2013:U6DAVEJPLX5ORFEYTIX5IJ67ZZ

not attested not anchored not stored refs pending

Fourier sparsity, spectral norm, and the Log-rank conjecture

Chung Hoi Wong, Hing Yin Tsang, Ning Xie, Shengyu Zhang

arxiv:1304.1245 v2 · 2013-04-04 · 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{U6DAVEJPLX5ORFEYTIX5IJ67ZZ}

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	2026-05-18T03:28:32.699460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7860a912f5dfae894989a2fd427dfce407d9d1e7e4f661a59645570db925037

Aliases

arxiv: 1304.1245 · arxiv_version: 1304.1245v2 · doi: 10.48550/arxiv.1304.1245 · pith_short_12: U6DAVEJPLX5O · pith_short_16: U6DAVEJPLX5ORFEY · pith_short_8: U6DAVEJP

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/U6DAVEJPLX5ORFEYTIX5IJ67ZZ \
  | 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: a7860a912f5dfae894989a2fd427dfce407d9d1e7e4f661a59645570db925037

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f8c87a2fc3189256e557e2296b9ebbe526acfb3b9f652f297467fedd55693b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2013-04-04T04:59:41Z",
    "title_canon_sha256": "acb4a0b4f9cbb78e3caf1e0a415bef2096c6ff261fc19f1b9c77186ba45e3881"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1245",
    "kind": "arxiv",
    "version": 2
  }
}