Pith Number

pith:FPSK2ACZ

pith:2026:FPSK2ACZ54LFDAJ6AVNS244XSA

not attested not anchored not stored refs pending

LightTune: Lightweight Forward-Only Online Fine-Tuning with Applications to Link Adaptation

Federico Penna, Ramy E. Ali

LightTune provides a backpropagation-free online fine-tuning method that adapts ML models on mobile devices to new conditions by triggering forward-only updates only when performance drops below a threshold.

arxiv:2604.12406 v2 · 2026-04-14 · cs.NI

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\usepackage{pith}
\pithnumber{FPSK2ACZ54LFDAJ6AVNS244XSA}

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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.

Claims

C1strongest claim

LightTune, a lightweight, backpropagation-free online fine-tuning framework with provable convergence guarantees, enables a substantial reduction in the average BLER prediction error of up to 48.8% and average throughput improvements of up to 15.5% compared to conventional OLLA.

C2weakest assumption

That opportunistically triggering fine-tuning only when performance falls below a predefined threshold, combined with forward-only updates, is sufficient to achieve reliable adaptation and convergence under real-world distributional shifts without introducing instability or excessive overhead.

C3one line summary

LightTune introduces a lightweight forward-only online fine-tuning framework that reduces BLER prediction error by up to 48.8% and boosts throughput by 15.5% in 6G link adaptation.

Receipt and verification

First computed	2026-05-22T01:04:02.234604Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2be4ad0059ef1651813e055b2d739790373aacede0197ae3221fe916cb82b8d1

Aliases

arxiv: 2604.12406 · arxiv_version: 2604.12406v2 · doi: 10.48550/arxiv.2604.12406 · pith_short_12: FPSK2ACZ54LF · pith_short_16: FPSK2ACZ54LFDAJ6 · pith_short_8: FPSK2ACZ

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/FPSK2ACZ54LFDAJ6AVNS244XSA \
  | 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: 2be4ad0059ef1651813e055b2d739790373aacede0197ae3221fe916cb82b8d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "136137b5b0dbd39546a7458dc4cd6baf9bd6b5df343119acedaa09f594c4bb35",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.NI",
    "submitted_at": "2026-04-14T07:43:07Z",
    "title_canon_sha256": "b0aa21225563cedd15e2f6e86f9ef472543083f9eae3950688be91399a9ebf54"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.12406",
    "kind": "arxiv",
    "version": 2
  }
}