Onur

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14 Posts

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Mar 5	asked	Continuity Properties
Dec 12	answered	Prove equivalence $(P \Rightarrow Q) \land (P \Rightarrow R) \Leftrightarrow P\Rightarrow(Q\land R)$
Dec 10	asked	How do mathematicians think about the existence of numbers?
Dec 10	answered	Need help with simple proof by mathematical induction
Dec 9	asked	left regular representation of $G$ with respect to $g$
Dec 9	asked	prove that $\text{lcm}(\text{lcm}(a,b),c)=\text{lcm}(a,\text{lcm}(b,c))$
Dec 2	asked	An abelian group is not isomorphic to an non-abelian group.
Dec 2	asked	Show that $\Bbb{Z}/4\Bbb{Z}\times\Bbb{Z}/2\Bbb{Z}\not\cong\Bbb{Z}/8\Bbb{Z}$
Nov 27	asked	A noneempty subset $H$ of a finite goup $G$ is a subgroup if and only if $H$ is closed
Nov 18	asked	Group(Non-abelian) Multiplication Table
Nov 18	asked	Order of a group element. [$\operatorname{ord}(x)$]
Oct 23	answered	How can I Prove that $[(p \to\neg q) \wedge q] \to \neg p$ is a tautology?
Oct 22	asked	Prove that the function $\Phi :\mathcal{F}(X,Y)\longrightarrow Y$, is not injective.
Oct 9	asked	Proving $\sum_{i=1}^{n}{\frac{i}{2^i}}=2-\frac{n+2}{2^n}$ by induction.

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