Two different notations for inner product
In my linear algebra course on the faculty of mathematics, we used the following notation for the inner product: $$\langle v, w \rangle$$ On the other han...
Published: Sep 06, 2026
Give a big-O estimate for a function f(x), use a simple function g of the smallest order.
Task Find a function $g(x)$ that is Big-O of $f(x)$ $f(x)$ is $\mathcal{O}(g(x))$ $f(x)=n\cdot log(n^2+1)+n^2\cdot log(n)$ I tried to follow/copy one of t...
Published: Sep 06, 2026
solve surface integral of a scalar function using divergence theorem
Use the Divergence Theorem to evaluate: $$\iint_S (2x+2y+z^2) dS$$ where $S$ is the sphere $$x^2+y^2+z^2=1.$$ Most of the examples on the book that needs ...
Published: Sep 06, 2026
How can i find the basis solutions of homogeneous linear ODE?
Second order linear differential equation is given below. $y''+\frac{2}{x}y'+k^2y=0,$ where $k$ is constant and $x\neq 0$ I already know th...
Published: Sep 06, 2026
Laplace Transform for Solving Differential Equation
I solved the following task, but since I am new in this field I need to check if it is correct or if there is anything I am missing or doing wrong. Task :...
Published: Sep 06, 2026
User Allen Knutson - Mathematics Stack Exchange
Q&A for people studying math at any level and professionals in related fields
Published: Sep 06, 2026
Finding value of k for which fg(x)=k has equal roots?
I've been going through this community and I Find this really helpful. About me(I know I should be precise but ya), I'm just a highschool studen...
Published: Sep 06, 2026
![How do I graph (-2,30) on a polar grid? [closed]](https://track.liberty.io/uploads/how-do-i-graph-2-30-on-a-polar-grid-closed_720.jpg)
How do I graph (-2,30) on a polar grid? [closed]
I tried to graph the point $(-2,30)$ on a polar graph and I think I got it wrong, how should it be graphed?
Published: Sep 06, 2026
Number of lines to connect $n \times n$ dots
The following is a popular riddle: Draw a $3 \times 3$ grid, and connect all the dots using only $4$ straight consecutive lines. The solution is to think ...
Published: Sep 06, 2026
Uniqueness of hamiltonian cycle
Let G be a graph on $n$ vertices, where $n \geq 8$ and with minimum degree at least $n/2$. Does $G$ have at least 2 distinct Hamilton cycles? (Two Hamilto...
Published: Sep 06, 2026
