FOCS Author Response

The FOCS 2026 CFP schedules no rebuttal, no discussion phase, and no author-visible reviews before decisions (checked 2026-07-08; any informal PC-initiated clarification in a given cycle: 待核实). At a venue with no second turn, "author response" is a set of practices displaced in time: persuasion happens before the deadline, correction happens after the decision, and almost nothing happens in between. This skill covers all three phases.

Phase 1 — the pre-emptive rebuttal (before submission)

Write the objections you would rebut, then edit the paper until each is answered where it would arise. Build the table with a co-author playing antagonist:

The discipline: every objection you can generate is answered in text a breadth reviewer will actually reach — inside the ten-page window, not in a page-40 remark. An objection answered only on page 40 is unanswered for the committee member who raises it in discussion.

Phase 2 — during review (April to notification)

The correct volume of author-initiated contact is near zero. Legitimate exceptions, all routed through the PC chair:

• You found a real bug. Report it promptly and factually: which lemma, what breaks, whether it is repaired. Chairs respect this; discovering the bug post-acceptance is far worse for everyone.
• A subsuming preprint appeared. A short factual note lets the PC judge with current information; silence gambles your credibility on the committee not checking arXiv.
• Procedural anomaly (e.g., you can prove a conflict was violated). State it once, without advocacy.

What is never legitimate: nudging, supplementary "clarification" emails, sending improved bounds (those belong in the next version), or contacting suspected reviewers. The venue's no-response design is deliberate; working around it reads as exactly what it is.

Phase 3 — after the decision

On acceptance, any reviewer comments arrive as gifts with no compliance mechanism; triage them into camera-ready fixes anyway (focs-camera-ready) — these are the field's most careful readers.

On rejection, run the resubmission protocol rather than the appeal instinct (there is no appeals process):

RESUBMISSION MEMO  (internal; one page; write within a week of the decision)
1. Verbatim quotes of every substantive review point (no paraphrase —
   paraphrase launders criticism into something easier to dismiss)
2. For each: ACCEPT (fix), REBUT (why wrong — with the proof/citation),
   or REFRAME (misreading caused by our text; fix the text, not the reader)
3. Venue decision: STOC (autumn deadline, 2027 cycle: 待核实) / SODA / CCC /
   ITCS / journal — re-run focs-topic-selection with the reviews as data
4. Diff plan: what changes before the next submission, owner and date each

Two norms specific to the theory two-flagship rhythm: first, the receiving STOC committee will overlap socially (though not formally) with the FOCS one, so resubmitting an unchanged paper is a recognized and quietly penalized move — visible improvement is the currency; second, update the arXiv version before the next submission so the public record and the resubmission agree (focs-reproducibility), with a changelog naming what strengthened.

A memo entry, worked

The difference between triage and rationalization is visible in the writing. A REBUT entry that will survive your own re-reading in a month:

R2: "The reduction in Section 6 appears to require bounded degree." Class: REFRAME (partially REBUT). The reduction does not require it — Lemma 6.4's proof handles arbitrary degree — but the statement of Lemma 6.4 as written only asserts the bounded case, so the reviewer read correctly. Action: restate Lemma 6.4 in full generality (the proof already covers it), add one sentence in the overview flagging that degree is unrestricted. Owner/date: LW, before STOC submission.

Note what the entry does not do: it does not label the reviewer careless, and it locates the repair in the text rather than in the reader. Most "wrong" reviews at this level are correct readings of imprecise writing.

Deciding between the autumn options

The memo's venue line deserves its own analysis, because the reviews tell you which committee to face next. Correctness complaints answered by real fixes point back to the flagship track (STOC next, FOCS after). Significance complaints from breadth readers, with depth readers positive, often mean the paper is loved by specialists — SODA, CCC, or SoCG may simply be its audience. Window complaints ("could not locate the proof of...") mean the paper can return to the same tier after an exposition rebuild alone. And uniformly thin reviews mean the decision carried no information: re-run focs-topic-selection from scratch and trust your own audit over the noise.

Tone calibration for all phases

Any text that reaches a chair or a future committee: factual, short, zero adjectives about your own work, zero speculation about reviewers' competence or identity. The theory community is small and has a long memory; the response style you practice here is part of your research reputation in a way that outlasts any single paper's outcome.