165 reputation
7
bio website
location
age
visits member for 2 years, 3 months
seen May 4 at 12:23

Dec
12
comment Give a context-free grammar to generate the following language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
Ok, thank you very much!
Dec
12
comment Give a context-free grammar to generate the following language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
How about the third attempt?
Dec
12
comment Give a context-free grammar to generate the following language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
Ok, how about the third attempt?
Dec
9
comment Row Reduction with Cofactor Expansion
Oh, I see. Thank you.
Dec
9
comment Row Reduction with Cofactor Expansion
Thank you! So, why does my calculator and wolframalpha say 396? wolframalpha.com/input/…
Dec
8
comment Give a context-free grammar to generate the following language $L = \{ a^ib^jc^k \space|\space 0 \leq i \leq j \leq i + k \}$
@user18297 You're right, thank you. Fixed it.
Nov
19
comment Describe the smallest subspace of $M_{2\times 2}$ that contains matrices…
Ah. In that case, the set IS the smallest subspace. It is the basis.
Nov
19
comment Describe the smallest subspace of $M_{2\times 2}$ that contains matrices…
@BrianM.Scott, how does this translate to a basis? I'm used to row reducing into free variables that I translate into a general solution.
Nov
19
comment Describe the smallest subspace of $M_{2\times 2}$ that contains matrices…
I guess my first instinct is to think, "No solution!". So if it's fine, then how do I translate that to a basis? Is it a free variable column, and I just disregard the column of 0s before it?
Nov
19
comment Describe the smallest subspace of $M_{2\times 2}$ that contains matrices…
I actually did that, though I got [1 0 0 2; 0 1 0 -4; 0 0 0 -4]. I'm not sure what to make of the last row. Do I just disregard it?
Nov
7
comment How can I prove a basis (for RowA, NulA, ColA, or NulA^T) with orthogonality conditions?
The edition is the 4th
Nov
7
comment How can I prove a basis (for RowA, NulA, ColA, or NulA^T) with orthogonality conditions?
Linear Algebra by David C Lay, Chapter 4
Nov
7
comment How can I prove a basis (for RowA, NulA, ColA, or NulA^T) with orthogonality conditions?
Ok. I'll have to figure how to extract the SVD from A.
Nov
7
comment Let $B = ${$1-t^2, t-t^2, 2-2t+t^2$}. Check that $B$ is a basis for $P_2$ and find $[3+t-6t^2]_B$
Okay. So, how would I find this from B? How would I prove that B is the basis for P_2? I'm not sure where to start.
Nov
7
comment How can I prove a basis (for RowA, NulA, ColA, or NulA^T) with orthogonality conditions?
@LittleO, how so?
Nov
7
comment Find a basis for the set of vectors in $\mathbb{R}^4$ in the subspace (hyperplane) $x_1 +x_2 + 2x_3 + x_4 = 0, x_1 + 2x_2-x_3=0$
A sheet my professor gave out as practice problems for our test.
Nov
7
comment Find a basis for the set of vectors in $\mathbb{R}^4$ in the subspace (hyperplane) $x_1 +x_2 + 2x_3 + x_4 = 0, x_1 + 2x_2-x_3=0$
The actual problem itself says that in the question.
Nov
7
comment Find a basis for the set of vectors in $\mathbb{R}^4$ in the subspace (hyperplane) $x_1 +x_2 + 2x_3 + x_4 = 0, x_1 + 2x_2-x_3=0$
It might not be, I could be wrong. I just followed a heuristic I found online, since it doesn't seem to be in my textbook.
Nov
7
comment How can I prove a basis (for RowA, NulA, ColA, or NulA^T) with orthogonality conditions?
Revised! Sorry about that. I should note that the question I'm reading isn't clear on what orthogonality conditions are, and that is where I'm confused. Thank you for the formatting advice.
Nov
7
comment Give an example of a $3$-dimensional subspace of $P_4$ which contains the polynomials…
This answer was fantastic, albeit a bit over my head. I believe this is an Einstein Summation? I'm assuming part of what it does can be labeled synonymous with the definition of linear independent if it = 0. I will study until I understand.