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lanskey
  • Member for 5 years, 11 months
  • Last seen more than a week ago
5 votes

An intuitive idea about fundamental group of $\mathbb{RP}^2$

4 votes

Why is homomorphism defined as such?

4 votes

Why does $x^2 = 0$ give a repeated root of $x=0,0$ instead of a single root of $x=0$.

2 votes

Is there a formula to count the number of sets in a power set that have given pairs of elements?

2 votes
Accepted

Is the set W a subspace of R2. If so find a basis and dimension.

2 votes
Accepted

If $L:\mathbb{R}^n \rightarrow \mathbb{R}^m$ and $m<n$ linear trans. What does this tell about injectivity and surjectivity?

1 vote

How many five-card hands can be dealt from a standard deck of 52 playing cards

1 vote

Notation for bijection

1 vote
Accepted

2D symmetry group with 1 or more rotations (nontrivial) but exactly 1 reflection (nontrivial)

0 votes

Function of a vector with same derivative

0 votes

Probability of going only right in a random walk

0 votes
Accepted

Vectors of same length, perpendicularity

0 votes

Homeomorphism with many fixed points

0 votes
Accepted

Unit + nilpotent = a unit

0 votes

direction vector for the line in the $xy$-plane that passes the origin and makes an angle $\theta$ with the positive _x_-axis