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la flaca's user avatar
la flaca's user avatar
la flaca
  • Member for 8 years, 6 months
  • Last seen more than 1 year ago
  • Montevideo, Uruguay
7 votes

How does one refute this ultrafinitist argument?

5 votes

The problem of instant velocity

5 votes

Are submodules of finitely generated free modules always free?

4 votes
Accepted

First-order language.

3 votes

Prove that $\{A\rightarrow \sim B, B, C \vee A\} \vdash C$ in this proof system

3 votes
Accepted

Translating to predicate logic

3 votes

Why does what I've written fail to define truth?

2 votes

about limit of a sequence

2 votes
Accepted

Comparing $\delta$ to $x-a$ in limit as $x$ approaches $a$

2 votes
Accepted

Subspace of a vector space

2 votes
Accepted

Disjunctive Normal Form for Fuzzy Logic

2 votes
Accepted

Propositional logic vs predicate logic: examples?

2 votes
Accepted

Notation for product of three sets

2 votes
Accepted

If R and S are both anti-symmetric, then R ∪ S is anti-symmetric

2 votes

Why doesn't the definition of limit allow $c$ to be element of $(a;b)$?

2 votes

Checking whether a multivariable function is convex

1 vote

Good ideas for communicating the joy of mathematics to nine and ten year olds

1 vote
Accepted

Show if function is Lebesgue-measurable

1 vote

$v_2$ is not substitutable for $v_1$ in $\forall \,v_1\,\forall\,v_2\,Bv_1v_2\to\forall v_2 Bv_2v_2$

1 vote

How to choose functions for proofs (proving linear functional)

1 vote

Truth sets and set diagrams

1 vote

Propositional Logic conversion (English to Language of Logic)

1 vote

Proof about subspaces in $R^3$

1 vote
Accepted

$V$ is vector space of polynomials $\mathbb R[X]_{<4}$. Let $U = \{P \in V : P(3) = 0\}$. Find a basis of $V/U$.

1 vote

"If p, then q" = "q unless ~p"?

1 vote

Proving that a relation is not symmetrical

1 vote

Does this notation for arbitrary unions and intersections make sense?

1 vote
Accepted

Let $T\colon \Bbb{R}^5\to\Bbb{R}^5$ be a linear operator such that $T^4\neq 0$ but $T^5=0$. What is the rank of $T^2$?

1 vote

Find a continuous and bounded function on $[0,\infty)$ where the extreme value theorem does not hold.

1 vote
Accepted

Propositional logic problem about truth tellers and liars