Pith Number

pith:VFATT5JP

pith:2021:VFATT5JP4T4OCL3OHP3LE6C24Q

not attested not anchored not stored refs pending

On audio enhancement via online non-negative matrix factorization

Andrew Sack, Deanna Needell, Michael Perlmutter, Palina Salanevich, Wenzhao Jiang

arxiv:2110.03114 v1 · 2021-10-07 · eess.AS · cs.SD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VFATT5JP4T4OCL3OHP3LE6C24Q}

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	2026-07-05T03:20:39.667555Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a94139f52fe4f8e12f6e3bf6b2785ae42aecd4db5452c2a50f60004c74841167

Aliases

arxiv: 2110.03114 · arxiv_version: 2110.03114v1 · doi: 10.48550/arxiv.2110.03114 · pith_short_12: VFATT5JP4T4O · pith_short_16: VFATT5JP4T4OCL3O · pith_short_8: VFATT5JP

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/VFATT5JP4T4OCL3OHP3LE6C24Q \
  | 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: a94139f52fe4f8e12f6e3bf6b2785ae42aecd4db5452c2a50f60004c74841167

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2354f77cd578332b903874ad204997814f59d7d449ce23ec1dd1da11c9bc683",
    "cross_cats_sorted": [
      "cs.SD"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.AS",
    "submitted_at": "2021-10-07T00:10:54Z",
    "title_canon_sha256": "8d68119d4dc005f5388b8b958da8ded74ea7e6bee25ec0d53d93e417481a8c1d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.03114",
    "kind": "arxiv",
    "version": 1
  }
}