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Rax Adaam
  • Member for 7 years, 8 months
  • Last seen more than a week ago
10 votes
1 answer
2k views

proving the determinant of a product of matrices is the product of their determinants in suffix / index notation

8 votes
1 answer
1k views

Why is this vector field not conservative, even though it has a potential? (what is the actual definition of a conservative vector field?)

6 votes
1 answer
551 views

8 Vs 10 Axioms / Properties of a Vector Space: Should Closure of Addition and Scalar Multiplication Be Included?

5 votes
2 answers
593 views

Determining the domain of a polynomial with rational exponents

4 votes
2 answers
147 views

$\int_0^1 \int_0^{1-y} \cos\Big( \frac{x-y}{x+y} \Big) \, dx dy$ [duplicate]

4 votes
2 answers
110 views

Handling a sequence in a series: $\sum_{n=1}^{\infty} \frac{(a_n)^n \cos(n\pi)}{n}$ for $a_n \rightarrow \tfrac{1}{2}$

3 votes
1 answer
731 views

Higher order partial derivatives of implicit function?

3 votes
1 answer
197 views

What Motivated the Definition of the Orthogonality of Functions?

3 votes
2 answers
319 views

"go / goes to" $(x \to y)$ vs. "maps to" $(x \mapsto y)$

3 votes
1 answer
114 views

In the notation $T\colon\mathbb{R}^{n} \to \mathbb{R}^m$, does $\mathbb{R}^m$ refer to the codomain or the image of $T$?

3 votes
3 answers
69 views

Notation for fields and the elements of the sets used to define them.

3 votes
2 answers
306 views

Notation for maps: is "$A$" in "$\alpha : A \to B$" always the domain?

2 votes
0 answers
246 views

Intuitive understanding of Taylor's Inequality (Lagrange's remainder)

2 votes
2 answers
59 views

Equivalent forms for $\int \csc(x) dx$

2 votes
1 answer
73 views

Correct algorithm for finding regions of increasing / decreasing and the relationship to critical points.

2 votes
1 answer
1k views

Why Does the Characteristic Equation of a Differential Equation Depend on the Solution?

2 votes
1 answer
42 views

is it possible to have $u(1,t) = 10$ and $u(x,0) = x^2$ for $x \in [0,1]$? (heat equation)

2 votes
1 answer
680 views

Why is a semiannular region not simply connected?

1 vote
1 answer
44 views

How to find the sum of $\sum_{n=1}^{\infty} (-1)^{n-1} \frac{3^n}{n5^n}$?

1 vote
0 answers
100 views

Understanding (Implicit) Partial Derivatives

1 vote
1 answer
154 views

Volume of revolution with coordinate transformation.

1 vote
0 answers
140 views

Applying boundary conditions for differential operator to show operator is hermitian.

1 vote
1 answer
92 views

Solving inexact DE with multivariable integrating factor provided.

1 vote
1 answer
47 views

Why does the domain affect whether or not a vector field is conservative?

1 vote
3 answers
108 views

understanding when "order" is implied by the multiplication principle

1 vote
1 answer
97 views

Combinations vs. permutations: knowing when and how to account for order Part 2

1 vote
0 answers
42 views

Do we distinguish between row and column vectors when speaking of $\mathbb{R}^n$?

1 vote
4 answers
108 views

Efficient method for minimizing $f = x^4 + 2y^4 + 3z^4$ over the unit sphere.

1 vote
0 answers
52 views

Extending the Binomial Series of $(a+x)^{k}$ to Cases Where $a<0$ Via Substitution

1 vote
0 answers
39 views

How to refer to an interval when it is not (yet) known whether it is open or closed? (Notation for intervals)