Piotr Benedysiuk's user avatar
Piotr Benedysiuk's user avatar
Piotr Benedysiuk's user avatar
Piotr Benedysiuk
  • Member for 8 years, 3 months
  • Last seen more than 1 year ago
  • Delft
8 votes

Why do most of the operations treating $dy/dx$ as a ratio works?

4 votes
Accepted

A Problem on Schrödinger's Equation

4 votes

Taylor expansion of imaginary part?-Doable or not?

3 votes

What is polynomial time?

3 votes
Accepted

Set-up the discrete problem for the standard five-point discretization of $\mathcal{L}$.

3 votes

How to approximate numerically the gradient of the function on a triangular mesh

3 votes
Accepted

Rewrite ${1 \over {1 + 2x}} - {{1 - x} \over {1+x}}$ to avoid loss of significance

3 votes
Accepted

Pointwise continuity and supremum/infimum.

3 votes

Can we solve an algebraic system where the number of equations is less than the number of unknowns?

3 votes

How to approach this integration : $\int\frac{4(x^3 - 1)}{4x^5 + 16x^3 + 4x^2 + 1} \; dx$

3 votes
Accepted

Using a derivative to find fourier coefficients

2 votes

Find minimum number of customers that must have visited the bakery that day?

2 votes

Greatest possible cardinality of a set of numbers less than 1000 such that the sums avoid powers of 2

2 votes

If $\int_{-x}^{x}f(t)dt=x^3-x^2+x+1$, then find $f(-2)+f(2).$

2 votes
Accepted

How to use the finite difference method to solve a transport equation with a source term?

2 votes
Accepted

Show the given series is a solution of $y''-xy'-y=0$

2 votes

Find the rate at which y is changing.

2 votes
Accepted

Is there a formula or an algorithm to find the power of any integer that returns zero?

2 votes

How to prove the limit $\lim\limits_{x \to \infty} \frac{x^{t}}{e^{x}} = 0$

2 votes

Prove $A - \lambda_1I$ is diagonalizable and eigenvalues

2 votes
Accepted

Book suggestions about eigenfunction expansion method in PDE solutions

2 votes

Big -O time complexity of an algorithm.

2 votes

Given a $2\times 2$ matrix $A$, compute $A^7$.

2 votes

calculating laplace transform of t^3*delta(t - 4)

2 votes

Evaluation of the limit by using epsilon-M approach.

2 votes

If $\int_2^{x^2}x\cdot f(s) ds=2x^5-x^4+2$, then find $f(9)$

2 votes

How to prove that this function is differentiable?

2 votes
Accepted

Inverse Matrix in Python

1 vote

Linear independence in polynomials

1 vote
Accepted

Interpretation of $\tilde{f}(\mathbf{0})$