 # Preliminary Maths for Deep Learning

In this series of posts, I will pick a source for Deep Learning and try to share my understanding and learnings on the topic. I want to treat this as my notes from these lessons. My notes tend to be very rough, in an attempt to keep a semblance of formality to them I am putting them out in public.

Machine Learning is primarily all about extracting information from data. Unlike simple situations in life data in Machine Learning comes in larger quantities. The most common form of this “large quantity” is a list of numbers. Mathematically, we would like to apply some abstraction and perform operations on them. Vectors are a good abstraction for such cases, a collection of such vectors can be represented by Matrices. Now Tensors are a generalized form of matrices allowing data to be represented along several axes.

Linear Algebra helps us understand the rules of simple operations on such a collection of numbers. In this post, I will only list the items or topics from Linear Algebra that we will need to apply Deep Learning in a practical manner.

Here’s the list, each of which we will cover in detail in future posts.

• Scalars
• Vectors
• Matrices
• Tensors
• Reduction of Tensors
• Non-Reduction Operations: Sum
• Dot Products
• Matrix-Vector Products
• Multiplication of Matrices
• Norms - L2, Frobenius

If you think you need any further topics to apply Deep Learning it is likely to be answered here or here.

As mentioned earlier, we will cover some or all of these topics in a bit more detail in separate tiny bite sized posts. Until then, happy whatever!