- #1
MathewsMD
- 433
- 7
I just had a few questions not directly addressed in my textbook, and they're a little odd so I thought I would ask, if you don't mind. :)
-Firstly, I was just wondering, why is it that Legendre polynomials are only evaluated on a domain of {-1. 1]? In realistic applications, is this a limiting factor? Is there a way to find solutions for a larger domain?
-Why exactly must n > -1?
Is there a particular reason why it's only evaluated for these values of n? Is there an another approach for n < -1? Also, must n be a a non-negative integer or can n be any real number greater than -1?
-Is there a relatively short proof to prove ## \int _{-1}^1 P_m P_n = \frac {2}{2n+1}; m = n ##? All the ones I've seen are quite long and tedious, and are not as intuitive as the other case for ## m \neq n ##. I was just curious since I could not seem to find one.
Also, as a side question: what exactly happens to matrices that undergo elementary row operations? I know the column space is distorted and the row space is intact for elementary row operations, but what exact properties are now the same and different between a matrix A and a matrix A' derived from elementary row operations on A?
Also, why is it necessary Legendre polynomials pass through the point (1,1)? Why is this point unique?
Sorry for the questions! A few that were just lingering in my head that I wanted to address. Thank you!
-Firstly, I was just wondering, why is it that Legendre polynomials are only evaluated on a domain of {-1. 1]? In realistic applications, is this a limiting factor? Is there a way to find solutions for a larger domain?
-Why exactly must n > -1?
Is there a particular reason why it's only evaluated for these values of n? Is there an another approach for n < -1? Also, must n be a a non-negative integer or can n be any real number greater than -1?
-Is there a relatively short proof to prove ## \int _{-1}^1 P_m P_n = \frac {2}{2n+1}; m = n ##? All the ones I've seen are quite long and tedious, and are not as intuitive as the other case for ## m \neq n ##. I was just curious since I could not seem to find one.
Also, as a side question: what exactly happens to matrices that undergo elementary row operations? I know the column space is distorted and the row space is intact for elementary row operations, but what exact properties are now the same and different between a matrix A and a matrix A' derived from elementary row operations on A?
Also, why is it necessary Legendre polynomials pass through the point (1,1)? Why is this point unique?
Sorry for the questions! A few that were just lingering in my head that I wanted to address. Thank you!
Last edited: