Errata: ItOCO Chapter 1

These are my mistakes, not the OCO textbook author's!

While I was doing a quick review of the material, I realized I made a tiny mistake in my hand-written definition of Theorem 1.2 in my post The Algorithms and Theorems of ItOCO Chapter 1 (based on Elad Hazan’s excellent textbook Introduction to Online Convex Optimization).

I’ve already corrected it in the post itself, but here are both the correct and the incorrect versions explicitly.

Correct ✅

Incorrect ❌

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The good thing is that I caught the mistake myself, which is a clear sign that I understand the material well and am able to catch my own mistakes, oversights, and inconsistencies myself. At least I definitely aim to do so.

However, if any attentive reader spots any mathematical or conceptual mistakes that I’m unaware of, please let me know by sending me a message via Substack and I will be sure to publish and attribute to you the correction.

Thanks in advance!

Yours truly,

Andrew Pak

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