Leonardo
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 Nov 27 asked What, if anything, does it mean to be neither finite nor infinite for real numbers? Oct 20 asked Tallest bubble tower induction proof Aug 12 asked How do I know what to substitute to simplify a limit? Aug 9 asked What is another, perhaps quicker and nicer way of solving this question? Aug 8 answered Help with Geometry (sphere) question Jul 22 asked How would you interpret this question focusing on problem solving? Jul 8 asked Finding points of intersection between a line and a curve Apr 10 asked How can I determine the values of a third point to make all 3 collinear in $\mathbb{R}^3$ Apr 7 asked What does it mean to be proportional to something? Apr 6 asked Find all values of $a$ such that $w = ai- \frac{a}{3}j$ is a unit vector Apr 6 asked Solve binomial expression with a variable under a square root? Mar 12 asked How might one go about proving this poorly worded theorem about divisibility with the number 3? Feb 26 asked Can we have a matrix whose elements are other matrices as well as other things similar to sets? Feb 26 asked Is this a correct proof for this relation? Feb 26 asked Is the relation on the positive integers defined by $(x,y) \in R$ if $x = y^2$ only antisymmetric? Feb 22 asked Does there exist any elements which I can add to a Relation such that the Relation remains Sym/Anti, Trans, and Reflexive? Feb 19 asked Prove that $f(n) = n^2 - 1$ is not injective and not surjective. Am I doing it right? Feb 5 asked How does one select some $i$ to prove $\exists i$ s.t. $s_i \leq A$ where $A$ is the average of real numbers $(s_1 + s_2 + . . . + s_n) / n$ Feb 5 asked Prove $x \in \mathbb{Q}$ and $y \notin \mathbb{Q} \implies (x + y) \notin \mathbb{Q}$ Jan 26 asked How would one prove that $\sqrt{n}$ is the largest divisor that needs to be checked to determine if $n$ is prime?