Marco Disce's user avatar
Marco Disce's user avatar
Marco Disce's user avatar
Marco Disce
  • Member for 12 years, 6 months
  • Last seen more than a week ago
  • Rome, Italy
14 votes

Where is the flaw in this "proof" that 1=2? (Derivative of repeated addition)

7 votes

Functions which are Continuous, but not Bicontinuous

7 votes
Accepted

Proving $|\sin x - \sin y| < |x - y|$

7 votes
Accepted

How to prove independence is not a transitive relation?

6 votes

Refuting the Anti-Cantor Cranks

5 votes

subset of binary space countable?

4 votes

Zero vector of a vector space

4 votes

Painting plane with 2 colors (2 points separated by 10 cm different colors )

3 votes

Can an infinite sum of irrational numbers be rational?

2 votes
Accepted

A question about an equation of a plane

2 votes

Non-geometric Proof of Pythagorean Theorem

2 votes

Upper bound for $\sum_{n=1}^xn^{k-1}$

2 votes
Accepted

Any open set in $\Bbb{R}^n$ is a countable union of closed sets

2 votes
Accepted

Multiplicity of real numbers in a tuple with known cardinality decidable?

2 votes

What's the point of allowing only quantification of variables in first-order logic.

2 votes

Meaning of the word "axiom"

1 vote

Would a theory with model $\{\}$ be consistent?

1 vote

Prove that the following set is enumerable using induction

1 vote

Can unprovability unprovable? Is there an $\omega$-fold unprovability?

1 vote

Are $XZ$ and $YZ$ independent if $X$, $Y$ and $Z$ are all independent?

1 vote

Show that every open ball is unique

1 vote

Problem on Rolle's Theorem

1 vote

A sequence of function $\{f_n\}$ that converges to $f$ point-wise almost everywhere

1 vote

Is $\mathbb{R}^{n} = \mathbb{Q}^{n}∪\mathbb{I}^{n}??$

1 vote

Showing that a function doesn't exist

1 vote

Basis and Linear Independence definitions

1 vote

How to determine whether dynamical systems are dissipative, conservative or expanding?

1 vote
Accepted

Is the Limit of the derivative of a $C^1$ function always the equal to the one-sided derivative?

1 vote

finding a function with natual coefficient from a set of real roots

1 vote
Accepted

Are dilation and rotation the same thing in Mobius transformation?