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Mathematics
amir na's user avatar
amir na's user avatar
amir na's user avatar
amir na
  • Member for 5 years, 8 months
  • Last seen more than 4 years ago
  • Iran
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8
All permutations of $1,2,...,n$ such that each element is larger than all previous elements or smaller than all previous elements
Feb 25, 2019
6
Prove that the maximum score difference between two consecutive teams in a tournament with $n$ teams is $n$
Feb 21, 2019
6
Combinatorial proof $\sum_i^{\lfloor{n/2}\rfloor} (-1)^i {n-i\choose i} 2^{n-2i} = n+1$
Apr 17, 2019
5
Derivative of an integral function with variable bound that appears in integrand $y(t) = \int_{t_0}^t \sin(t-s)g(s)ds$
Apr 15, 2019
4
A triple integration that need change of boundary
Jun 25, 2019
3
Showing that $\lim\limits_{x→0}\frac{x\sin(1/x)-\cos(1/x)}x$ does not exist without sequence
Nov 23, 2018
3
Question about time between poisson events
Nov 7, 2019
3
Find a Curve that is perpendicular to another curve
Jun 26, 2019
3
Finding tangent to intersection of two surfaces
Jun 26, 2019
2
Coloring a graph with odd number of vertices with k (which is close to Δ) colors in linear time
Jan 21, 2020