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  • 33 votes cast
Feb
24
comment Pretty simple question about running time
Thanks @ArturoMagidin didn't know about Lambert's W function. Actually that's the solution.
Feb
24
asked Pretty simple question about running time
Feb
18
comment Why this subset of $\mathbb{R}^3$ is not a subspace?
So, It was kinda simple :( I'm sorry but didn't knew how to test it.
Feb
18
revised Why this subset of $\mathbb{R}^3$ is not a subspace?
deleted 4 characters in body
Feb
18
asked Why this subset of $\mathbb{R}^3$ is not a subspace?
Feb
16
comment Orthogonal vectors with given magnitude
Ummm now I see, the free parameters are the parameters of the general solution. Thanks again.
Feb
16
awarded  Commentator
Feb
16
comment Orthogonal vectors with given magnitude
Thank you very much David. Just one more thing. Why do you say the system has two free parameters? I mean, doesn't has three including also v3?
Feb
16
accepted Orthogonal vectors with given magnitude
Feb
16
asked Orthogonal vectors with given magnitude
Feb
5
comment If $A^2 = I$ (Identity Matrix) then $A = \pm I$
Thank you @Martin Wanvik, pretty clear explanation.
Feb
5
accepted If $A^2 = I$ (Identity Matrix) then $A = \pm I$
Feb
5
asked If $A^2 = I$ (Identity Matrix) then $A = \pm I$
Aug
26
accepted Power a Matrix (Without calculating)
Aug
26
revised Power a Matrix (Without calculating)
added 154 characters in body
Aug
26
comment Power a Matrix (Without calculating)
Well indeed I have the "feeling" that given that 1 only changes on its sig then its the same the power of 3 that the power of 2001 but I'm not sure. I'm correct?
Aug
26
asked Power a Matrix (Without calculating)
Aug
24
comment Cartesian equation with just one vector
Thanks joriki. Do you know any book maybe more soft than fraleigh's linear algebra (with I'm currently using 'cause was the used where I get my bachelors degree). I'm a lawyer that (for weird reasons) build software and likes maths and want to self-study them as much as I can. I don't know if the book election was fine but maybe you could provide me a more useful reference.
Aug
24
accepted Cartesian equation with just one vector
Aug
24
comment Cartesian equation with just one vector
Thanks for the reply Shawn, so the cartesian equation can be seen as a parametric equation?