updates
Could you explain the definition of mesh?
For the context, I have seen various definitions, like this: Or this: I would like to concentrate to the first one (Definition 19.) and understand this de...
Apr 17, 2026
Archive: Updates
updates
Test for Onto function
My textbook shows that $f:\Bbb R \to \Bbb R:3-4x$ is an onto function in the following way: Let,$$y=3-4x.$$ Then,$$x=\frac{(3-y)}{4}$$ Thus,for each $y\in...
Apr 17, 2026
updates
find out that system is time-invariant or not
Is this system linear and time-invariant? $$y(t) = −3x(2t − 2) + x(t)$$ I found this that is not time-variant but I am not sure.
Apr 17, 2026
updates
Sum of all integers
No, I'm not talking about $-\frac{1}{12}$. I was talking with someone the other day, and they said that the sum of all integers, positive and negativ...
Apr 17, 2026
updates
Find the indicated derivative
Find the indicated derivative $\frac {d}{dt}$ $\frac {(6t-5)^6}{t+9}$ I'm stuck after getting to this part $\frac {(6t-5)^6-36(6t-5)^5(t+9)}{(t+9)^2}...
Apr 17, 2026
![what is a double point in a curve? Is it located only at origin? [closed]](https://news.conceivablytech.com/uploads/what-is-a-double-point-in-a-curve-is-it-located-only-at-origin-closed_720.jpg)
updates
what is a double point in a curve? Is it located only at origin? [closed]
I want to know whether a double point like a node or a cusp is only located at origin.
Apr 17, 2026
updates
What's the value of tau?
I've seen $\tau$ on a title of a YouTube video and I need help knowing what the value is. I'm serious. I've never heard of the value. So, w...
Apr 17, 2026
![Find mising numbers from a sequence 1,4,?,16,?,36,? [closed]](https://news.conceivablytech.com/uploads/find-mising-numbers-from-a-sequence-1-4-16-36-closed_720.jpg)
updates
Find mising numbers from a sequence 1,4,?,16,?,36,? [closed]
Please help me find the number absent in the line for the follow sequence $1,4,?,16,?,36,?$. For example I know the absent number in the sequence $5,0,-5,...
Apr 17, 2026
![Convergence of integrals implies convergence in $L^1$ [duplicate]](https://news.conceivablytech.com/uploads/convergence-of-integrals-implies-convergence-in-l-1-duplicate_720.jpg)
updates
Convergence of integrals implies convergence in $L^1$ [duplicate]
I have this problem which is exactly the opposite of what I would find easy to prove! Consider a sequence of Lebesgue measurable non-negative functions $(...
Apr 17, 2026
updates
What are some examples of infinite dimensional vector spaces?
I would like to have some examples of infinite dimensional vector spaces that help me to break my habit of thinking of $\mathbb{R}^n$ when thinking about ...
Apr 17, 2026
