Reputation
Next tag badge:
373/400 score
182/80 answers
Badges
10 140 280
Newest
 Nice Answer
Impact
~1.3m people reached

May
22
answered Can a unit of infinite order in algebraic integers of a number field be an arbitrarily high power of another unit?
May
22
answered The Change-making problem algorithm proof (at the dynamic programming method)
May
22
comment “Standard first term” of a series
The fist index is usually the firs element of $\mathbb N$ :)
May
22
comment If $n$ is a natural number and $n$ is a $4th$ power and a $5th$ power prove it is a $20th$ power.
Consider the prime factorization of $n$
May
22
comment Does this math formula with $1/PI\begin{cases}^\infty_{-\infty}\end{cases}$ mean anything?
So the best suggestion is to replace $\{$ with $\int$ and $PI$ with $\pi$.
May
22
comment Homomorphisms between abelian groups
The asumption that $H,K$ be abealian is not needed
May
22
comment Find Values of Riemman Zeta Function
Is there any value known to be omitted at all?
May
22
comment How to establish the distributive property of sum notation
You have a typo in your base case: $a_1+a_1$ should be $a_1+b_1$
May
22
answered How to establish the distributive property of sum notation
May
22
answered How many archers do I need to deploy to destroy an Archer Tower?
May
22
comment Knight movement on chess field
@DoctorMoisha Well, they are not and it's hard to guess the right names from a direct translation - for example, a direct translation from German would be: King, lady, runner, horse (or jumper), tower, farmer instead of the correct terms king, queen, bishop, knight, rook, pawn. - So now you at least have a reference list for the future ;)
May
22
revised Show that the rings $2\mathbb{Z}$ and $3\mathbb{Z}$ are not isomorphic.
added 6 characters in body
May
22
comment Show that the rings $2\mathbb{Z}$ and $3\mathbb{Z}$ are not isomorphic.
@AlexR Not everybody drops the "i" from "ring" if the $1$ is dropped.
May
22
answered Show that the rings $2\mathbb{Z}$ and $3\mathbb{Z}$ are not isomorphic.
May
22
comment Little confusion about connectedness
@S.Panja-1729 The necessary condition is that $A\cup B$ cannot be written as the union of nonempty deisjoint open sets.
May
22
answered Find all 4 digits numbers that $ABCD=(CD)^2$
May
22
comment Knight movement on chess field
Chess folks call your "horses" "knights"
May
22
answered Arithmetic modulo $n$ when $n>a$
May
22
revised $\{\,z\in \mathbb C : \operatorname{Im}(z)>-1 , |z|<2\, \}$ onto upper half space $\{\,z\in \mathbb C : \operatorname{Im}(z)>0 \,\}$
added 39 characters in body; edited title
May
22
answered $\{\,z\in \mathbb C : \operatorname{Im}(z)>-1 , |z|<2\, \}$ onto upper half space $\{\,z\in \mathbb C : \operatorname{Im}(z)>0 \,\}$