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Mathematics
Vincenzo Tibullo's user avatar
Vincenzo Tibullo's user avatar
Vincenzo Tibullo's user avatar
Vincenzo Tibullo
  • Member for 13 years, 6 months
  • Last seen this week
  • Università di Salerno
Profile Activity

15 Questions

Score Activity Newest Views
9 votes
7 answers
9k views

How to find $\lim\limits_{x\to0}\frac{e^x-1-x}{x^2}$ without using l'Hopital's rule nor any series expansion?

6 votes
0 answers
250 views

How to solve a particular initial-boundary value problem

4 votes
1 answer
687 views

Cesàro mean for a divergent sequence

4 votes
1 answer
839 views

Differentiability of $x^2\log(x^4+y^2)$ at $(0,0)$

3 votes
4 answers
272 views

Prove the polynomial $x^4+4 x^3+4 x^2-4 x+3$ is positive

2 votes
1 answer
130 views

Residues of the function $\exp\big(\frac{2z}{z^2-1}\big)$

2 votes
2 answers
193 views

Definite integral with residues and a double pole

2 votes
1 answer
170 views

What is the English name of these definitions?

2 votes
0 answers
82 views

A simpler solution for a geometric problem

1 vote
1 answer
712 views

Inequality involving a positive (semi) definite quadratic form

1 vote
1 answer
323 views

Positive semi-definiteness of the adjoint matrix

1 vote
0 answers
24 views

Find unknown such that four dependent quantities have the same value.

1 vote
1 answer
50 views

Equivalence of norms with one boundary condition

0 votes
2 answers
85 views

Convolution product and zero-product property

0 votes
0 answers
111 views

Positive definiteness limited to vectors of positive components