1,155 reputation
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age 19
visits member for 3 years, 3 months
seen 21 hours ago

Sep
27
accepted How should I interpret a “but” when symbolizing logic statements?
Sep
26
accepted If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$?
Sep
26
accepted How to determine $(X \subseteq A \land \overline{X} \subset B) \implies A \cap B = \emptyset$ for $X$ and $B$ in $E$?
Sep
25
accepted Can I affirm that the Universe is an element of this set?
Sep
25
accepted How do I determine whether $18 \notin A$ with these premises?
Sep
24
accepted Can I determine $(\forall x \in \mathbb{N}) [P(x) \implies (Q(x) \lor \lnot R(x))]$ without using a counter-example?
Sep
21
accepted Can I apply the absorption law on $(\lnot R \land P) \land (Q \lor P) \equiv P$?
Dec
7
accepted What is wrong with my polynomial division? $x^3-2x^2-5x+6$
Dec
7
accepted How to verify if $aRb \leftrightarrow a - b \le 10$ is total?
Dec
7
accepted How was $f(x) = -2x-1$ found in this system?
Dec
7
accepted How do I solve inequalities of the form $\frac{ax}{b}\geq0$?
Dec
6
accepted How can I prove that if a relation is symmetric then its inverse is also symmetric?
Dec
6
accepted How to “make up a formula” of a sum?
Dec
6
accepted If $aRb \land bRc$ never occurs, is a relation considered transitive?
Dec
5
accepted Why is the composition of relations $R$ and $S$ written $S \circ R$ instead of $R \circ S$?
Dec
4
accepted How to prove $A\cap B \subseteq \overline{A \triangle B}$
Dec
4
accepted Is a contradiction enough to prove a set equality to $\varnothing$?
Dec
4
accepted When would I NOT use a double implication when proving equalities between sets?
Dec
3
accepted Are these two venn diagrams valid for $(A-B)\cup (B\cap C)$?
Dec
2
accepted Should I perform a disjunctive syllogism directly on three expressions simultaneously?