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# 1,239 Posts

 2h answered Equation of Class of a group of cardinality 60. 1d answered Finding the equivalence classes of a relation R 1d answered Given a complete graph of n vertices Kn (has all possible edges – one edge between pair of vertices). 1d answered How many scientists can survive? Apr18 answered Determine the Kernel and Homomorphisms Apr16 answered Checking for the reducibility of a polynomial using rational root theorem Apr16 answered Possibilities of license plates with special rules Apr16 answered Probability that every player is dealt a heart Apr15 answered How to Prove with Mathematical Induction $3^n > n^2$ Apr15 answered Complement of a Regular Graph Apr15 answered How do I show that $\mathbb{Z}_4\times\mathbb{Z}_6$ has only 3 subgroups of size 12? Apr14 answered Book recommendation for Abstract Algebra Apr14 asked Albert, Bernard and Cheryl popular question (Please comment on my theory) Apr9 answered How to formally prove: if d|(da+b), then d|b? Apr8 answered Problem on a square group Apr8 answered Must PID contain 1? Apr8 answered Prove that if $a$ and $a-1$ are relatively prime to $n$ then $1+a+a^2+\cdots+a^{\varphi(n)-1}\equiv 0 \pmod n$ Apr8 answered How can I prove the inverse of a function is odd? Apr7 asked How can we detect if a topological space has “holes”. Mar28 answered Does there exist any formula for finding out $\phi(n!)$