m. k.

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169 Answers

newest activity votes
18
How to prove $|z_1-z_2| \geq |z_1|-|z_2|$ in other way than this?
15
Is there a formula for $(1+i)^n+(1-i)^n$?
14
More than 99% of groups of order less than 2000 are of order 1024?
14
If a finite group $G$ is solvable, is $[G,G]$ nilpotent?
14
Prove $2^{1/3}$ is irrational.
12
Calculate the 146th digit after the decimal point of $ \frac{1}{293} $
11
Groups with transitive automorphisms
10
If $G$ is a group with order $364$, then it has a normal subgroup of order $13$
9
Is there an idempotent element in a finite semigroup?
9
Finite groups, where the number of subgroups is equal to the number of elements
9
Find $ n\geq1 $ such that 7 divides $n^n-3$
8
If G is a non-abelian group with non-trivial Center, is it true that the commutator of G is not the whole group G?
8
If $H\leq G$ and $H$ is a maximal subgroup of $G$ then $[G:H]$ is prime and vice versa
8
Number of solutions of $x^d = 1_G$ .
8
What are the situations, in which any group of order n is abelian
8
There are at most two prime numbers dividing $|G|$
8
Why is $\gcd(a,b)=\gcd(b,r)$ when $a = qb + r$?
8
Why $A_{5}$ has no subgroup of order $15$?
8
Conjugacy classes of a $p$-group
8
Determine group G as cyclic
7
$G$ is a nonabelian finite group, then $|Z(G)|\leq \frac{1}{4}|G|$
7
Is there an abelian and a nonabelian group with same numbers of elements of each order.
7
How could we solve $x$, in $|x+1|-|1-x|=2$?
7
A non-abelian $p$-group $G$
7
How to solve integral recursive relation - $I_n=\int_0^1(x-x^2)^ndx$
7
Normal subgroup of prime order is characteristic
6
When is the group of units in $\mathbb{Z}_n$ cyclic?
6
How to find subgroups of $ \;\;\Bbb Z_2\times \Bbb Z_6$
6
Sudokus as composition tables of finite groups
6
Number of Homomorphisms from $\Bbb{Z}_m$ to $\Bbb{Z}_n$
1 2 3 4 5 6