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123
  • Member for 9 years, 9 months
  • Last seen more than 3 years ago
31 votes
2 answers
56k views

Meaning of the backslash operator on sets

7 votes
1 answer
9k views

Partial Fraction Decomposition with exponent in numerator

5 votes
2 answers
559 views

prove the set of all functions such that $f:\mathbb{Z} \to \mathbb{Z}$ where $|f(x)-f(y)|=|x-y|$ form a group under composition

4 votes
0 answers
12k views

Prove $H \cap K$ is itself a subgroup of $G$ if $H$, $K$ are subgroups of $G$

4 votes
2 answers
143 views

Question about initial value problem

3 votes
3 answers
1k views

Cardinality of infinite sets - Help with intuition

3 votes
2 answers
289 views

Find an $\epsilon$ such that the $\epsilon$ neighborhood of $\frac{1}{3}$ contains $\frac{1}{4}$ and $\frac{1}{2}$ but not $\frac{17}{30}$

3 votes
2 answers
37 views

Exponents with Logs

2 votes
2 answers
386 views

Proving a function is onto?

2 votes
2 answers
4k views

The square of a standard Normal random variable

2 votes
1 answer
1k views

Group under composition

2 votes
1 answer
125 views

Reproducing a graph using an incidence matrix

2 votes
1 answer
2k views

Let G be a simple graph with n vertices and m edges. Prove the following holds!!

2 votes
3 answers
7k views

Proof that $A\cap B$ and $A-B$ are disjoint

2 votes
1 answer
89 views

2nd order linear differential equation with non-constant coefficients

2 votes
1 answer
117 views

Finding Solution of 2nd order ODE near a regular singular point

2 votes
1 answer
98 views

Help with Differential Equation

1 vote
2 answers
324 views

Integration by parts

1 vote
2 answers
2k views

Proving that an equilateral triangle in the plane cannot have vertices on integer lattice points

1 vote
1 answer
41 views

Mathematical reasons for hull design relative to sustainable angle of heel

1 vote
2 answers
42k views

Prove or disprove - If a divides b and b divides a does a=b

1 vote
2 answers
7k views

LaPlace transform of $t^2\sin(at)$

1 vote
2 answers
2k views

Direct proof for: If $|a|<\epsilon$ for all $\epsilon>0$, then $a=0$ [duplicate]

1 vote
1 answer
25 views

Simple multivariate probability

1 vote
0 answers
144 views

Finding the probability density function of $U=Y_1+Y_2$

1 vote
2 answers
77 views

How could I generate this sequence?

1 vote
0 answers
49 views

Proving that S is a metric space

1 vote
0 answers
58 views

Help with an econometrics/statistical modeling question

0 votes
0 answers
28 views

Binary relations for Cobb-Douglas

0 votes
0 answers
198 views

Does the additive closure of a set always have additivity?