## Search found 1175 matches

Fri Dec 26, 2014 12:05 am
Forum: Introductions
Topic: It's Me! *Mahi* - Nur Muhammad Shafiullah
Replies: 0
Views: 3649

### It's Me! *Mahi* - Nur Muhammad Shafiullah

Hello! I am Nur Muhammad Shafiullah, from Dhaka, Bangladesh. I am from Dhaka College, HSC batch 2014. Before that, I was in Monipur High School & College, SSC batch 2012. I have been an International Mathematical Olympiad (IMO) contestant from Bangladesh from 2011 to 2014 [1]- currently holding the ...
Tue Dec 23, 2014 12:45 pm
Forum: Number Theory
Topic: Equation On Sum Of Divisor
Replies: 2
Views: 1896

### Re: Equation On Sum Of Divisor

Hint/ideas for the second solution? Because after finding the one liner, there are too many ways to take on this.
Thu Dec 04, 2014 9:08 pm
Topic: BdMO National 2013: Primary 2, Junior 1
Replies: 11
Views: 6764

### Re: BdMO National 2013: Primary 2, Junior 1

That was because I edited the post. Forgot to clarify that part, sorry.
Thu Dec 04, 2014 9:06 pm
Forum: News / Announcements
Replies: 4
Views: 5025

Yes you can, and no, they can't.
Mon Nov 24, 2014 8:51 pm
Forum: Number Theory
Replies: 2
Views: 1826

### Re: function for quadratic residue

This question is meaningless without fixing a proper range for $f$ - for example, every $a$ satisfies the conditions if $f(x)=\sqrt {x+a}$.
Sun Oct 26, 2014 9:05 am
Forum: Computer Science
Topic: Hackers again
Replies: 10
Views: 9818

### Re: Hackers again

1. Spybot search and destroy http://www.safer-networking.org/mirrors/
That should be enough.
Thu Oct 23, 2014 6:11 pm
Forum: News / Announcements
Topic: Combinatorics Workshop: Day 1 (04.12.13)
Replies: 7
Views: 7223

### Re: Combinatorics Workshop: Day 1 (04.12.13)

Which one, and which part was the problem? They are discussed quite comprehensively here. I don't think we can do any better if you do not point to a specific part of the examples.
Wed Oct 22, 2014 7:59 pm
Forum: Secondary Level
Topic: Functional divisibility
Replies: 3
Views: 2227

### Re: Functional divisibility

$f^{100}(n) = 3^{100}(n+1)-1$, and if the proposition is correct this too implies $3|1$.
Any corrections, Mim?
Tue Oct 21, 2014 10:16 am
Forum: Algebra
Topic: (Angle)^(Side)[Inequality]
Replies: 7
Views: 3494

### Re: (Angle)^(Side)[Inequality]

This function is concave for $x \in \left (0, \frac \pi 2 \right )$ and convex for $x \in \left ( \frac \pi 2 , \pi \right )$.
Mon Oct 20, 2014 11:16 pm
Forum: Algebra
Topic: (Angle)^(Side)[Inequality]
Replies: 7
Views: 3494

### Re: (Angle)^(Side)[Inequality]

On which function?