# Omega

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bio website location age 19 member for 3 years, 2 months seen Mar 8 at 0:40 profile views 170

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 Sep26 comment If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? @MinimusHeximus: I found $E = \{A,B,1,2,3\}$ fairly reasonable :( Sep26 comment If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? @MinimusHeximus: How do I break out of the ambiguity? Sep26 accepted If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? Sep26 comment If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? Oh.... OH.... My bad english strikes again. Ah, thank you, this would've been awful for all the other exercises. Sep26 comment If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? @BrianM.Scott: Hm... I fear that the exercise doesn't mention that. Sep26 comment If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? Why isn't $A$ an element of $E$? I mean, the exercise says that $A$ and $B$ are contained in $E$. Sep26 comment If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? Wait, $A \in E$ and $B \in E$, so you mean $E = \{A,B,1,2,3\}$? Sep26 asked If $A = \{1\}$ and $B = \{2\}$, can I conclude that $\overline{A} \subseteq B$? Sep26 comment How to determine $(X \subseteq A \land \overline{X} \subset B) \implies A \cap B = \emptyset$ for $X$ and $B$ in $E$? Would it be pretty much the same thing if it happened to be an $\subseteq$ instead of $\subset$? Sep26 accepted How to determine $(X \subseteq A \land \overline{X} \subset B) \implies A \cap B = \emptyset$ for $X$ and $B$ in $E$? Sep26 comment How to determine $(X \subseteq A \land \overline{X} \subset B) \implies A \cap B = \emptyset$ for $X$ and $B$ in $E$? I didn't quite get the there exist $x\in B$ that are also in $B - \bar{X} \subset X \subset A$ part. What did you do there? Sep26 asked How to determine $(X \subseteq A \land \overline{X} \subset B) \implies A \cap B = \emptyset$ for $X$ and $B$ in $E$? Sep26 revised Demosntrating that $\{1,2\} \notin A \implies \{2\} \notin A$ for $A \subseteq P(E)$ added 4 characters in body Sep26 asked Demosntrating that $\{1,2\} \notin A \implies \{2\} \notin A$ for $A \subseteq P(E)$ Sep25 accepted Can I affirm that the Universe is an element of this set? Sep25 comment Can I affirm that the Universe is an element of this set? @DanielFischer: Ah, I see. Thanks! You should post that as an answer. Sep25 comment Can I affirm that the Universe is an element of this set? @DanielFischer: I was wondering this too - I mean, how can I say that the universe is E and not something like $\mathbb{N}$? Sep25 asked 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? Sep25 comment How do I determine whether $18 \notin A$ with these premises? @N.S.: Ah! An implication... you're right. Thank you.