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Gold's user avatar
Gold's user avatar
Gold
  • Member for 13 years, 8 months
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59 votes

What are the Differences Between a Matrix and a Tensor?

36 votes
Accepted

Differentiating $y=x^{2}$

31 votes

What is $-i$ exactly?

29 votes
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Jacobian for a Cartesian to Polar-Coordinate Transformation

26 votes
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Intuition for cross product of vector with itself and vector with zero vector

23 votes
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Why is differential calculus built on open sets?

15 votes
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What does $\frac{dy}{du}$ mean?

13 votes
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Why vector calculus seems inconsistent and vague

12 votes
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Concept of Linearity

12 votes
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What's the difference between arccos(x) and sec(x)

11 votes

Differentiation with sigma notation

10 votes

Understanding the differential $dx$ when doing $u$-substitution

9 votes
Accepted

Why isn't the derivative of $e^x$ equal to $xe^{(x-1)}$?

8 votes

Definition(s) of rational numbers

8 votes
Accepted

Evaluate the Triple integral Using spherical coordinates

8 votes

“$f$ is a function from $A$ to $B$” vs. “$f $is a function from $A$ into $B$”?

7 votes

Definition of pull back operation

7 votes

A basis for a subspace of $\mathbb R^3$

6 votes
Accepted

Prove $\lim_{n\to \infty}\frac{n}{n+1} = 1$ using epsilon delta

6 votes

Linear Algebra and Geometry by Kostrikin and Manin: Remark regarding diagrams and graphic representations.

6 votes
Accepted

$e^z, \ \ z \in \mathbb{C}$ isn't invertible

6 votes

Given $2$ sets: $A:=\{1, 2,3\}$ and $B:=\{a, b, c\}.$ Are $A$ and $B$ equivalent?

5 votes

Prove $\det(kA)=k^n\det A$

5 votes
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Inverse of derivative

5 votes
Accepted

How to find zero of an space

5 votes

Finding subset of vectors which form a basis

5 votes
Accepted

Einstein Summation with multiple terms

5 votes
Accepted

Calculus Leibniz' notation

5 votes

Show that $d/dx (a^x) = a^x\ln a$.

4 votes

Why do mathematicians use single-letter variables?