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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 $|x-y|$?