#### Linear Algebra

## Dot Product

#### Linear Algebra

## Orthogonal and Orthonormal Vectors

#### Linear Algebra

## Eigenspace

An Eigenspace is a basic concept in linear algebra, and is commonly found in data science and in engineering and science in general.

#### Machine Learning Algorithm

## Hierarchical Clustering

#### Statistics Sentiment Analysis

## TF-IDF — Term Frequency-Inverse Document Frequency