Pith Number

pith:YPDA6ROI

pith:2013:YPDA6ROIHARK25D5YF6VLQSUXW

not attested not anchored not stored refs pending

A Fast Hadamard Transform for Signals with Sub-linear Sparsity in the Transform Domain

Martin Vetterli, Robin Scheibler, Saeid Haghighatshoar

arxiv:1310.1803 v2 · 2013-10-07 · cs.IT · math.IT · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YPDA6ROIHARK25D5YF6VLQSUXW}

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	2026-05-17T23:46:56.055380Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3c60f45c83822ad747dc17d55c254bda98ece607b7c01cdd255d1d0b81adfb4

Aliases

arxiv: 1310.1803 · arxiv_version: 1310.1803v2 · doi: 10.48550/arxiv.1310.1803 · pith_short_12: YPDA6ROIHARK · pith_short_16: YPDA6ROIHARK25D5 · pith_short_8: YPDA6ROI

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/YPDA6ROIHARK25D5YF6VLQSUXW \
  | 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: c3c60f45c83822ad747dc17d55c254bda98ece607b7c01cdd255d1d0b81adfb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67c3ef0dbe3be16a323af175f39256bb7bd2a7530b8351f207d7639fea89581d",
    "cross_cats_sorted": [
      "math.IT",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-10-07T14:46:51Z",
    "title_canon_sha256": "19a95dc016977e70ca5aa40f231b48f4058d65247d786c3f68717bfa174b176a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.1803",
    "kind": "arxiv",
    "version": 2
  }
}