User Gold - Mathematics Stack Exchange

59 votes

What are the Differences Between a Matrix and a Tensor?

answered Jun 6, 2013 at 1:23

36 votes

Accepted

Differentiating $y=x^{2}$

answered Jul 11, 2013 at 19:40

31 votes

What is $-i$ exactly?

answered May 19, 2013 at 14:39

29 votes

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Jacobian for a Cartesian to Polar-Coordinate Transformation

answered Nov 8, 2013 at 2:49

26 votes

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

answered May 10, 2013 at 23:36

23 votes

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Why is differential calculus built on open sets?

answered Aug 17, 2013 at 14:09

15 votes

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

answered Aug 17, 2013 at 23:38

13 votes

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Why vector calculus seems inconsistent and vague

answered Apr 13, 2013 at 18:13

12 votes

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Concept of Linearity

answered Mar 15, 2013 at 19:08

12 votes

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

answered May 15, 2013 at 23:51

11 votes

Differentiation with sigma notation

answered Apr 28, 2013 at 3:59

10 votes

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

answered May 25, 2013 at 20:38

9 votes

Accepted

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

answered May 27, 2013 at 14:38

8 votes

Definition(s) of rational numbers

answered May 18, 2013 at 15:39

8 votes

Accepted

Evaluate the Triple integral Using spherical coordinates

answered Mar 24, 2013 at 22:40

8 votes

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

answered Jun 14, 2013 at 17:40

7 votes

Definition of pull back operation

answered Apr 21, 2013 at 0:31

7 votes

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

answered May 29, 2013 at 18:57

6 votes

Accepted

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

answered May 27, 2013 at 17:34

6 votes

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

answered Mar 22, 2013 at 19:02

6 votes

Accepted

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

answered Nov 11, 2013 at 10:35

6 votes

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

answered Sep 20, 2015 at 19:17

5 votes

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

answered Jul 12, 2013 at 18:33

5 votes

Accepted

Inverse of derivative

answered Jun 12, 2017 at 23:49

5 votes

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How to find zero of an space

answered Mar 6, 2013 at 18:20

5 votes

Finding subset of vectors which form a basis

answered Sep 26, 2012 at 0:01

5 votes

Accepted

Einstein Summation with multiple terms

answered Apr 30, 2013 at 14:41

5 votes

Accepted

Calculus Leibniz' notation

answered Jun 1, 2013 at 21:25

5 votes

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

answered May 22, 2013 at 3:58

4 votes

Why do mathematicians use single-letter variables?

answered Jun 4, 2013 at 0:06

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115 Answers

What are the Differences Between a Matrix and a Tensor?

Differentiating $y=x^{2}$

What is $-i$ exactly?

Jacobian for a Cartesian to Polar-Coordinate Transformation

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

Why is differential calculus built on open sets?

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

Why vector calculus seems inconsistent and vague

Concept of Linearity

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

Differentiation with sigma notation

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

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

Definition(s) of rational numbers

Evaluate the Triple integral Using spherical coordinates

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

Definition of pull back operation

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

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

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

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

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

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

Inverse of derivative

How to find zero of an space

Finding subset of vectors which form a basis

Einstein Summation with multiple terms

Calculus Leibniz' notation

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

Why do mathematicians use single-letter variables?