# Omega

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# 94 Accepts

 Sep27 accepted How should I interpret a “but” when symbolizing logic statements? Sep26 accepted If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? Sep26 accepted How to determine $(X \subseteq A \land \overline{X} \subset B) \implies A \cap B = \emptyset$ for $X$ and $B$ in $E$? Sep25 accepted Can I affirm that the Universe is an element of this set? Sep25 accepted How do I determine whether $18 \notin A$ with these premises? Sep24 accepted Can I determine $(\forall x \in \mathbb{N}) [P(x) \implies (Q(x) \lor \lnot R(x))]$ without using a counter-example? Sep21 accepted Can I apply the absorption law on $(\lnot R \land P) \land (Q \lor P) \equiv P$? Dec7 accepted What is wrong with my polynomial division? $x^3-2x^2-5x+6$ Dec7 accepted How to verify if $aRb \leftrightarrow a - b \le 10$ is total? Dec7 accepted How was $f(x) = -2x-1$ found in this system? Dec7 accepted How do I solve inequalities of the form $\frac{ax}{b}\geq0$? Dec6 accepted How can I prove that if a relation is symmetric then its inverse is also symmetric? Dec6 accepted How to “make up a formula” of a sum? Dec6 accepted If $aRb \land bRc$ never occurs, is a relation considered transitive? Dec5 accepted Why is the composition of relations $R$ and $S$ written $S \circ R$ instead of $R \circ S$? Dec4 accepted How to prove $A\cap B \subseteq \overline{A \triangle B}$ Dec4 accepted Is a contradiction enough to prove a set equality to $\varnothing$? Dec4 accepted When would I NOT use a double implication when proving equalities between sets? Dec3 accepted Are these two venn diagrams valid for $(A-B)\cup (B\cap C)$? Dec2 accepted Should I perform a disjunctive syllogism directly on three expressions simultaneously?