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Daryl
  • Member for 9 years, 11 months
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38 votes
Accepted

How to generate random symmetric positive definite matrices using MATLAB?

26 votes

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

12 votes
Accepted

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

10 votes
Accepted

How to find an intersection of a 2 vector subspace?

8 votes
Accepted

Game combinations of tic-tac-toe

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 $n^n$?

8 votes

Solve the differential equation using Taylor-series expansion

7 votes

Rotate and scale a point around different origins

6 votes

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

6 votes
Accepted

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

6 votes
Accepted

Evaluate $\frac{d}{dx}ⁿx$.

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

Find the Area of the ellipse

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

I need help with this IBVP

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
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?

4 votes

How to compute the determinant of a tridiagonal matrix with constant diagonals?

3 votes

Linear algebra help!

3 votes

Eigenvalue theorem

3 votes

Analog of Simplex Method for Quadratic Programming

3 votes
Accepted

Application of Backward euler method

3 votes
Accepted

Direction Field for System of Equations

3 votes
Accepted

Heat Equation with One Non-Homogeneous Boundary Condition

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