Pith Number

pith:QYHMXQDC

pith:2022:QYHMXQDCJQUE4Q3P3NJQBTD3WE

not attested not anchored not stored refs pending

Graph Fourier transform based on singular value decomposition of directed Laplacian

Cheng cheng, Qiyu Sun, Yang Chen

arxiv:2205.06242 v1 · 2022-05-12 · eess.SP · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QYHMXQDCJQUE4Q3P3NJQBTD3WE}

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	2026-07-05T04:22:46.748743Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

860ecbc0624c284e436fdb5300cc7bb122e5c430dd195d3d3fc6b1dd80cb2ab3

Aliases

arxiv: 2205.06242 · arxiv_version: 2205.06242v1 · doi: 10.48550/arxiv.2205.06242 · pith_short_12: QYHMXQDCJQUE · pith_short_16: QYHMXQDCJQUE4Q3P · pith_short_8: QYHMXQDC

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/QYHMXQDCJQUE4Q3P3NJQBTD3WE \
  | 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: 860ecbc0624c284e436fdb5300cc7bb122e5c430dd195d3d3fc6b1dd80cb2ab3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0fb2775aac08f38a975ea24b539a9241ca96fc6a6f5c2dfde56835394fe38ed",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2022-05-12T17:40:37Z",
    "title_canon_sha256": "6498bbb7c6893c9c7e64d2476b1415b94dc4f4194dce7bd935cdcc8fa3e48492"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2205.06242",
    "kind": "arxiv",
    "version": 1
  }
}