Pith Number

pith:ULT55MXL

pith:2026:ULT55MXLHD5FYT5PFJH6K26EWS

not attested not anchored not stored refs pending

SURF: Separation via Unsupervised Remixing Flow

Arnaud Doucet, Efthymios Tzinis, Henry Li, John R. Hershey, Matt Shannon, Robin Scheibler

arxiv:2606.04921 v1 · 2026-06-03 · cs.SD · eess.AS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ULT55MXLHD5FYT5PFJH6K26EWS}

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	2026-06-04T01:09:55.750724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2e7deb2eb38fa5c4faf2a4fe56bc4b491a53d5cca67e1a3c5337131ad26cda1

Aliases

arxiv: 2606.04921 · arxiv_version: 2606.04921v1 · doi: 10.48550/arxiv.2606.04921 · pith_short_12: ULT55MXLHD5F · pith_short_16: ULT55MXLHD5FYT5P · pith_short_8: ULT55MXL

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/ULT55MXLHD5FYT5PFJH6K26EWS \
  | 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: a2e7deb2eb38fa5c4faf2a4fe56bc4b491a53d5cca67e1a3c5337131ad26cda1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2939dc4de8be5bed662aa70124c5d87348e481da99eb72d4098dfbbb3fa68a72",
    "cross_cats_sorted": [
      "eess.AS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SD",
    "submitted_at": "2026-06-03T14:17:12Z",
    "title_canon_sha256": "d37ecfc80ca157d59e5b37d5edd8c6526a76ad65564cf978ef793854fed2f9ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.04921",
    "kind": "arxiv",
    "version": 1
  }
}