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Baffo rasta
  • Member for 4 years, 11 months
  • Last seen more than a month ago
  • Florence, FI, Italia
5 votes
4 answers
4k views

How do you show that $\lim_{(x,y)\to(0,0)} \frac{xy}{x^2+y}$ doesn't exist?

5 votes
3 answers
216 views

How do you integrate $\int \frac{\cos(4x)}{\cos(x)}dx$?

4 votes
3 answers
1k views

Why $\{ \lambda x + (1-\lambda){y}\;\lvert\; \lambda \in [0,1] \}$ represents the line segment between $x,y$?

3 votes
2 answers
327 views

Beppo Levi's theorem, is this assertion correct?

3 votes
1 answer
2k views

What is a jump function, and which measure does it induce?

2 votes
1 answer
128 views

Weird thing about z-transform and difference

2 votes
1 answer
615 views

Is this proof for linearity of Expectation correct?

2 votes
3 answers
126 views

How to prove that $2< e <4$ by the definition of logarithm?

1 vote
3 answers
58 views

How to behave in limits calculus when both special limits, taylor and De l'Hopital cannot be applied?

1 vote
0 answers
73 views

Intuition behind Caratheodory's definition for measurable sets? [duplicate]

1 vote
3 answers
226 views

Binomial coefficients and words of $n$ bits, why this works?

1 vote
1 answer
122 views

Proposition about continuity of measures and sigma-additivity, need a proof.

1 vote
1 answer
222 views

I don't understand something about Laplace Theorem (binomial distribution)

1 vote
2 answers
69 views

Trouble with detail in proof of Weierstraß theorem

1 vote
0 answers
17 views

Random variables and characteristic function, a small doubt here.

1 vote
2 answers
129 views

Proving that in an homogeneous DTMC $i\leftrightarrow j$ and $j$ is recurrent $\implies f_{ij}=1$

1 vote
1 answer
85 views

Time continuous discrete states Poisson processes, why is this piecewise constant?

1 vote
1 answer
286 views

Sum of absolutely continuous independent random variables

1 vote
0 answers
35 views

What is the standard representation for items in the ring $\mathbb F_q[x]$ where $q$ is a power of a prime?

0 votes
0 answers
93 views

Minimum distance between convex polygon vertices on a plane?

0 votes
0 answers
31 views

I need an algorithmical way to randomly partition a rectangle into smaller rectangles

0 votes
0 answers
9 views

I need some material about Poisson disk sampling

0 votes
1 answer
74 views

Tricky exercises for Calculus II, where can I find them?

0 votes
1 answer
47 views

Sum of this converging telescoping series?

0 votes
5 answers
120 views

How is this inequality plotting a circle? $3\sqrt{x^2+y^2}\leq 10-x^2-y^2$

0 votes
3 answers
127 views

How do you compute the following integral $\int\limits_{-\infty}^{+\infty} x^2 e^{-x^2/2} dx$?

0 votes
0 answers
44 views

Compute this (probably really easy) double integral (domain is only drawn).

0 votes
0 answers
100 views

Need to show that if a function $f$ is continuous then the inverse image of every open set is open, am I correct?

0 votes
2 answers
275 views

Equivalent definitions of equivalence between linear codes, why is it?

0 votes
1 answer
74 views

Doubt about $\mathbb C\left[ X\times Y \right]$ and $\mathbb C\left[ X\right]\times\mathbb C\left[ Y\right]$ being isomorphic.