# Introduction

Welcome to the fmin.xyz - attempt to build intuitive systematic review of optimization theory, methods and applications.

The site contains following parts:

The site has simple built-in search 🔍. You can use it to find anything you want.

Rules of formatting and contributing could be found on the readme page on the github repo.

# Principles

• This site aims on researchers and enthusiasts with some prior expertise in the field (not just the Wikipedia clone).
• The fundamental primitive structure of this site is the page.
• The page should consist short self-sufficient material about the topic.
• If the page is based on paper, bibtex label should be added at the beginning.
• The general structure of the site is flexible and should be improved over the time iteratively.

# Notations and terms

These notations will be used by default (unless otherwise specified)

• $\theta$ – optimizing variable
• $\mathbb{R}^p$$p$-dimensional Euclidian space
• $\theta^*$ – global optimizer of the problem
• $\| \cdot \|$ – norm of the vector(matrix) (if nothing specified, we often use Euclidian (Frobenius) norm)
• $\| \cdot \|_*$ – dual norm (norm in dual space) (if nothing specified, we often use Euclidian (Frobenius) norm)