Difference between revisions of "Math for Intelligence"

From
Jump to: navigation, search
Line 37: Line 37:
 
<youtube>PXwStduNw14</youtube>
 
<youtube>PXwStduNw14</youtube>
 
<youtube>3icoSeGqQtY</youtube>
 
<youtube>3icoSeGqQtY</youtube>
 +
 +
== Mathematics Ontology ==
 
<youtube>OmJ-4B-mS-Y</youtube>
 
<youtube>OmJ-4B-mS-Y</youtube>
  
Line 49: Line 51:
  
 
<youtube>tUsrLNHZXvc</youtube>
 
<youtube>tUsrLNHZXvc</youtube>
 +
<youtube>NDq_VaZ3iSQ</youtube>
 
<youtube>NNxHOtPUnzg</youtube>
 
<youtube>NNxHOtPUnzg</youtube>
 
<youtube>lEIyGJru3Uk</youtube>
 
<youtube>lEIyGJru3Uk</youtube>
<youtube>NDq_VaZ3iSQ</youtube>
+
 
  
 
=== Vectors ===
 
=== Vectors ===

Revision as of 10:34, 14 June 2020

YouTube search... ...Google search


Getting Started

Mathematics Ontology

Mathematics for Machine Learning | M. Deisenroth, A Faisal, and C. Ong .. Companion webpage ...

Scalar, Vector, Matrix & Tensor

fig0201a.png


Vectors

are an array of numbers. The numbers are arranged in order and we can identify each individual number by its index in that ordering. We can think of vectors as identifying points in space, with each element giving the coordinate along a different axis. In simple terms, a vector is an arrow representing a quantity that has both magnitude and direction wherein the length of the arrow represents the magnitude and the orientation tells you the direction. For example wind, which has a direction and magnitude.

Scalars

are just a single number. For example weight, which is denoted by just one number.

Matrices

A matrix is a 2D-array of numbers, so each element is identified by two indices instead of just one. If a real valued matrix A has a height of m and a width of n, then we say that A in Rm x n. We identify the elements of the matrix as A_(m,n) where m represents the row and n represents the column.

Tensors


3blue1brown

Explained


Siraj Raval

Gilbert Strang (MIT) - Linear Algebra

Fourier Transform (FT), Fourier Series, and Fourier Analysis

Joseph Fourier showed that representing a function as a sum of trigonometric functions greatly simplifies the study of heat transfer. Joseph was a French mathematician and physicist born in Auxerre and best known for initiating the investigation of Fourier series, which eventually developed into Fourier analysis and harmonic analysis, and their applications to problems of heat transfer and vibrations. The Fourier transform and Fourier's law of conduction are also named in his honor. Fourier is also generally credited with the discovery of the greenhouse effect.

  • Fourier Transform (FT) decomposes a function of time (a signal) into its constituent frequencies. This is similar to the way a musical chord can be expressed in terms of the volumes and frequencies of its constituent notes. Fourier Transform | Wikipedia
  • Fourier Series is a periodic function composed of harmonically related sinusoids, combined by a weighted summation. The discrete-time Fourier transform is an example of Fourier series. For functions on unbounded intervals, the analysis and synthesis analogies are Fourier Transform and inverse transform. Fourier Series | Wikipedia
  • Fourier Analysis the study of the way general functions may be represented or approximated by sums of simpler trigonometric functions. Fourier Analysis | Wikipedia

tumblr_mj34wzLpLc1s5nl47o1_r2_400.gif