Pith Number

pith:7QRH52NC

pith:2019:7QRH52NCJJTSNYS22DRPYMLW5T

not attested not anchored not stored refs pending

Multi-layered Cepstrum for Instantaneous Frequency Estimation

Chin-Yun Yu, Li Su

arxiv:1902.00539 v1 · 2019-02-01 · eess.AS · cs.SD · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7QRH52NCJJTSNYS22DRPYMLW5T}

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	2026-05-17T23:54:52.908455Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc227ee9a24a6726e25ad0e2fc3176ecc6c67931ded15a436f2bb243f1470228

Aliases

arxiv: 1902.00539 · arxiv_version: 1902.00539v1 · doi: 10.48550/arxiv.1902.00539 · pith_short_12: 7QRH52NCJJTS · pith_short_16: 7QRH52NCJJTSNYS2 · pith_short_8: 7QRH52NC

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/7QRH52NCJJTSNYS22DRPYMLW5T \
  | 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: fc227ee9a24a6726e25ad0e2fc3176ecc6c67931ded15a436f2bb243f1470228

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59fd0942e044f5b25ef451b6624b9675e6d771cddfce804eb20fd3d07261fccc",
    "cross_cats_sorted": [
      "cs.SD",
      "eess.SP"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "eess.AS",
    "submitted_at": "2019-02-01T20:03:15Z",
    "title_canon_sha256": "c63085f26596a180ce4e3ff4bf6d135db79fdc2a33c10c97c64654a4075b6290"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00539",
    "kind": "arxiv",
    "version": 1
  }
}