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Daryl's user avatar
Daryl's user avatar
Daryl
  • Member for 11 years, 10 months
  • Last seen more than a month ago
44 votes
Accepted

How to generate random symmetric positive definite matrices using MATLAB?

27 votes

How would you explain to a 9th grader the negative exponent rule?

13 votes
Accepted

To invert a Matrix, Condition number should be less than what?

11 votes
Accepted

Game combinations of tic-tac-toe

11 votes
Accepted

Rotate and scale a point around different origins

10 votes
Accepted

How to find an intersection of a 2 vector subspace?

9 votes

Solve the differential equation using Taylor-series expansion

8 votes
Accepted

Can we assume left and right pseudo-inverse to be close enough?

8 votes

Proof: For all integers $x$ and $y$, if $x^3+x = y^3+y$ then $x = y$

8 votes

Is there a Definite Integral Representation for $n^n$?

6 votes
Accepted

Evaluate $\frac{d}{dx}ⁿx$.

6 votes

How to plot a phase portrait for this system of differential equations?

5 votes

GMRES algorithm

5 votes
Accepted

How many ways can you choose a committee if for a married couple, you must choose both or neither

5 votes
Accepted

Numerically solving a system of nonlinear ODEs with boundary conditions

4 votes

I need help with this IBVP

4 votes

Finding the number of basic/zero variables at an optimal corner point in linear programming

4 votes

Find all matrices $A$ of order $2 \times 2$ that satisfy the equation $A^2-5A+6I = O$

4 votes

Find the Area of the ellipse

4 votes
Accepted

Is this a linear programming problem

4 votes
Accepted

How to solve the non-homogeneous PDEs: $u_x + u_y=2u,\ u(x,0)=h(x)$?

4 votes

Analog of Simplex Method for Quadratic Programming

4 votes

How to compute the determinant of a tridiagonal Toeplitz matrix?

4 votes
Accepted

Why is the particular solution for $x''+9x=80\cos(5t)$ equal to $x_p = A\cos(5t)$ and not $x_p = A\cos(5t) + B\sin(5t)$?

4 votes
Accepted

Can we make such matlab code so that every time we run the program it will return the same randomly generated matrices?

3 votes
Accepted

Need matlab help related with the iteration method

3 votes

Proof of uniqueness of LU factorization

3 votes
Accepted

When would this employee retire?

3 votes

Prove by induction: $2^n = C(n,0) + C(n,1) + \cdots + C(n,n)$

3 votes

finding matrices whose product is zero but neither of the two matrices are zero matrices

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