agent154
Reputation
2,900
Top tag
Next privilege 3,000 Rep.
 Dec 11 asked What is an intuitive definition for “conjugate” in Group Theory? Nov 29 asked Finding the zero divisiors of $\mathbb{Z}_{n}$ Oct 21 asked How to find the left cosets of a group? Oct 19 asked Subgroups of $G=(\mathbb{Z}_{12},+)$ Sep 29 asked Cubic polynomial and its discriminant Sep 27 asked How to “establish” the basic properties of a commutative ring? Sep 24 asked Prove that $2^n>n^4$ for all $n\geq 17$ Sep 24 asked Direct proof of the existence of Strong Induction using the Well Ordering Principle Sep 22 asked Proving that $\alpha:\mathbb{R}\to\mathbb{R}$ where $\alpha(x)=\frac{x^{3}}{x^{2}+1}$ is bijective Sep 21 asked Give an example of two functions $\alpha,\beta$ on a set $A$ such that $\alpha\circ\beta=\mathsf{id}_{A}$ but $\beta\circ\alpha\neq\mathsf{id}_{A}$. Sep 21 asked How many reflexive and symmetric relations are in set $A$? Sep 20 asked Determine whether the function $\alpha:A\times B\rightarrow B\times A$ where $\alpha((a,b))=(b,a)$ is injective and/or surjective Sep 20 asked Prove that $(\mathbb{R}\setminus \{0\},\sim):= ab>0$ is transitive. Sep 19 asked How do I prove that a multi-part function is injective and/or surjective? Sep 19 asked Show that $A\setminus (B\setminus C)=(A\setminus B)\cup(A\cap B\cap C)$ Aug 4 asked From what set of numbers can $a$ and $b$ be from in the complex number $a+bi\in\mathbb{C}$ Mar 9 asked How can I find the coefficient of a term in this generating function by using the “old” method? Mar 3 asked How do I design a generating function to count subsets of distinct objects? Feb 2 asked How to tell if I am double counting in a combinatorics problem? Dec 17 asked How does the triangle inequality work for $|x-y|$?