erref">Concept map</a></li><li class="chapter-star"><a href="frontmatter_fragment.html#preface" class="heading hyperref">Preface</a></li><li class="chapter-star"><a href="frontmatter_fragment.html#introduction" class="heading hyperref">Introduction</a></li><li class="chapter"><a href="01_math_fundamentals_fragment.html#chapter-math_fundamentals" class="heading hyperref"><span class="number">Chapter 1 </span>Math fundamentals</a></li><li><ul><li class="section"><a href="01_math_fundamentals_fragment.html#sec