- #1
LLT71
- 73
- 5
first of all assume that I don't have proper math knowledge. I came across this idea while I was studying last night so I need to verify if it's valid, true, have sense etc.
orthogonality of function is defined like this:
https://en.wikipedia.org/wiki/Orthogonal_functions
I wanted to understand concept a bit further so I came across the explanation that says dot product of two functions is almost the same (or similar?) thing as dot product of two vectors, but I didn't knew how to visualize that multiplication of two functions "inside integral" (I assume it's dot product of two functions) to understand it. I assume inside integral should be something like cos(theta) where theta is angle between two functions, but than I got to a conclusion when you usually/always plot graphs of functions for example in 2D coordinate system functions are always/usually "parallel" to one another so cos(theta)=cos(0)=1. I remember from physics class that any point in coordinate system could be represented by a vector of position so I got an idea, can we just "transform" that integral like this:
let y(x)=any function ex. sin(x) and g(x)=any function ex. cos(x), a→ be position vector for every point of function y(x), and b→ be position vector for every point of function g(x). can we define orthogonality like this:
if the sum of all dot products of position vectors a→ and b→ for every instant, on some interval is zero than functions that those two vectors represent are orthogonal. (sorry for poor vector notation)
thank you!
orthogonality of function is defined like this:
https://en.wikipedia.org/wiki/Orthogonal_functions
I wanted to understand concept a bit further so I came across the explanation that says dot product of two functions is almost the same (or similar?) thing as dot product of two vectors, but I didn't knew how to visualize that multiplication of two functions "inside integral" (I assume it's dot product of two functions) to understand it. I assume inside integral should be something like cos(theta) where theta is angle between two functions, but than I got to a conclusion when you usually/always plot graphs of functions for example in 2D coordinate system functions are always/usually "parallel" to one another so cos(theta)=cos(0)=1. I remember from physics class that any point in coordinate system could be represented by a vector of position so I got an idea, can we just "transform" that integral like this:
let y(x)=any function ex. sin(x) and g(x)=any function ex. cos(x), a→ be position vector for every point of function y(x), and b→ be position vector for every point of function g(x). can we define orthogonality like this:
if the sum of all dot products of position vectors a→ and b→ for every instant, on some interval is zero than functions that those two vectors represent are orthogonal. (sorry for poor vector notation)
thank you!