Register to reply 
Finding the inverse of matrices 
Share this thread: 
#19
Mar1605, 09:35 AM

PF Gold
P: 1,236

I tried coming up with general number of operations you'd perform with either method to determine which is faster, and I just dont have time right now..
matt, which one is faster  augmented matrix or adjoint/determinant method? Ive counted about 47 operations on adj/det method, and I'm guessing there is more in augmented method 


#20
Mar1705, 09:03 PM

P: 534




#21
Mar1705, 09:06 PM

P: 534




#22
Mar1705, 11:59 PM

P: 998

Not equal to zero and invertible mean the same thing for elements of a field~



#23
Mar1805, 04:23 AM

Sci Advisor
HW Helper
P: 9,396

But we aren't dealing with a field. Invertible is indeed the correct term.



#24
Mar1805, 05:49 AM

Emeritus
Sci Advisor
PF Gold
P: 16,091

For example, an integer matrix has an integer inverse if and only if its determinant is 1 or 1  because those are the only invertible integers!



#25
Mar1805, 12:11 PM

P: 534

ah... that makes sense.



Register to reply 
Related Discussions  
Matrices Inverse properties  Precalculus Mathematics Homework  3  
Inverse matrices help please  Precalculus Mathematics Homework  9  
Finding an inverse in F7, matrices...1 mod 7?  Calculus & Beyond Homework  0  
Having troubles showing A has no inverse or finding the inverse, matrices.  Introductory Physics Homework  0  
Inverse of Matrices  Linear & Abstract Algebra  3 