Basis for an invertible linear transformation
I'm working through Hoffman's linear algebra book right now for a proof-based class on Linear Algebra and I'm a little confused about some ...
21 Apr 2026 1 READS
Archive: News
Permutations with 26 letters
Not totally sure if I'm understanding the questions correctly: Consider the permutations of the set of 26 letters of the English alphabet How many to...
21 Apr 2026 1 READS
Covering spaces - why are they useful?
As someone who trained as a physicist, I have known for ages that $\operatorname{SU}(2)$ is a double cover of $\operatorname{SO}(3)$, so, during an idle d...
21 Apr 2026 1 READS
Finding Second Derivative using implicit differentiation
Find $y'' of$ $9x^2 + y^2 = 7$ Work I've been working on this one for a while now, I'm not sure where I'm going wrong. I posted a...
21 Apr 2026 1 READS
What are the properties of the modulus
Is the modulus $\%$ commutative, associative, or etc? For example, can I do this: Here is an equation I'm using: $$h_1 = (a \cdot a \cdot c_1 + a \cd...
21 Apr 2026 1 READS
meaning of fundamental solution
i would like to understand what is a mathematical,even physical meaning of fundamental solution,let us consider following problem from Wikipedia $Lf=sin(x...
21 Apr 2026 1 READS
How to find the volume of the region bounded by three graphs?
The problem asks given the region bounded by the graphs of y=lnx, y=0, and x=e, find a. the volume of the solid generated by revolving the region about th...
21 Apr 2026 1 READS
variable with negative exponent in the denominator moved to nominator and vice versa
The top and bottom of the fraction both contain negative exponents. Since $c^{-3}$ on the bottom has a negative exponent, it is moved to the top of the fr...
21 Apr 2026 1 READS
![Questions tagged [telescopic-series]](https://edu.smbbmcl.edu.pk/uploads/questions-tagged-telescopic-series_720.jpg)
Questions tagged [telescopic-series]
Q&A for people studying math at any level and professionals in related fields
20 Apr 2026 1 READS
Row reducing a matrix
So my teacher today gave some homework. I need to know how to row reduce the matrix $\left[ \begin{array}{ccc} 6 & 5 & 6 \\ 1 & 4 & 3 \\ 0...
20 Apr 2026 1 READS
