Sean Roberson's user avatar
Sean Roberson's user avatar
Sean Roberson's user avatar
Sean Roberson
  • Member for 9 years, 6 months
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37 votes

In Linear Algebra, what is a vector?

22 votes

Trouble understanding only one way implication truth

17 votes
Accepted

Prove if $n^2$ is even, then $n$ is even

14 votes

How to remember which function is concave and which one is convex?

13 votes
Accepted

A Function whose Domain is [-8,6]?

10 votes

Mathematical adjectives that bear famous mathematician's names

10 votes

Finding $\binom{n}{4}$ if $\binom{n}{6}=\binom{n}{9}$

10 votes
Accepted

Why is $0! = 1$?

9 votes

Is zero an element of the empty set?

9 votes

How is $\ln$ pronounced by English speakers?

8 votes

Difference between $\square $ and $\blacksquare $

8 votes
Accepted

$x^4 - 4x^3 + 6x^2 - 4x + 1 = 0$

7 votes

Cantor Theorem assumes set is non-empty?

6 votes

Addition of quadratic form in linear algebra

6 votes

Why do bell curves appear everywhere?

6 votes
Accepted

Is the identity matrix an upper triangular matrix?

6 votes
Accepted

Zeros of complex functions - simple question

5 votes

Why does $ \operatorname{Var}(X) = E[X^2] - (E[X])^2 $

5 votes
Accepted

Is $\text{span}\{(1, 1, 0, 0), (1, 2, 0, 0)\} = \mathbb{R}^2$?

5 votes
Accepted

Integrating $ (x^2+2x+3)^{-2}$

5 votes
Accepted

How do you deal with Math Frustration?

5 votes
Accepted

Is Cross Product of two vectors a linear transformation? (Linear Algebra)

5 votes

max summation notation?

5 votes

Why is the number of diagonals in an $n$-sided polygon $\frac{n\cdot(n-3)}{2}$?

4 votes

Do four Vectors form a Basis in R3?

4 votes
Accepted

How Many Subspaces Does The Zero Vector Space Have?

4 votes

problem on odd function

4 votes
Accepted

Can the infinite sum of $\frac{2^{2k-1}}{5^{k+3}}$ be calculated with the formula of geometric series?

4 votes
Accepted

Do we have to include the value corresponding to the cancelled factor in the range?

4 votes
Accepted

Figuring out an equation for a tangent line

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