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Saikat
  • Member for 8 years, 10 months
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18 votes

Big List of Erdős' elementary proofs

10 votes

Big List of Erdős' elementary proofs

10 votes

Proofs of AM-GM inequality

8 votes

Big List of Erdős' elementary proofs

7 votes

Examples of fallacies in arithmetic and/or algebra

7 votes

Big List of Erdős' elementary proofs

6 votes

Good "history of mathematical ideas" book?

4 votes
Accepted

Why does $\lim_{x\to0}\frac{\sin(x)}{x}$ equal $1$?

4 votes

Should I be concerned if I cannot solve most exercises in my textbook?

3 votes
Accepted

There are 4 nickle coins and 4 half nickle coins. How many different options are there for the sum of 5 coins.

3 votes

Big List of Erdős' elementary proofs

3 votes

Proof that $2^m+1$ is a prime number if $m=2^k$

2 votes

Proof that the sum of the first $n$ odd numbers is $n^2$.

2 votes

Any tips on integrating this? $\int \frac {dx} {a\sin^2x + b\cos^2x}$

2 votes

Find the smallest $a\in\mathbb{N}$, so that $a\equiv3\cdot 5^4\cdot 11\cdot 13^3 \pmod 7$

2 votes

How to simplify $\lim_{n\to \infty}\sum_{r=1}^n \tan^{-1} \dfrac{2r+1}{r^4+2r^3+r^2+1}$

2 votes

How can I prove that only there continuous odd prime are $3,5,7$?

2 votes

How to Catch Up?

2 votes

Induction Proof for $F_{2n} = F^2_{n+1} - F^2_{n-1}$

2 votes

Proof: Sum of the combination of the these numbers are not equal.

1 vote

Prove that $n^4-n^2$ is divisible by $8$ if $n$ is an odd positive integer.

1 vote

Big List of Erdős' elementary proofs

1 vote

Big List of Erdős' elementary proofs

1 vote

Finding the prime number $n$: why checking for a divisor between 2 and $\lfloor \frac{n}{2} \rfloor$ is enough?

1 vote

Calculate the Derivative of the Integral

1 vote

Book recommendations

1 vote

Abstract Algebra Book Request

1 vote

Big list of journals with free access to back issues.

1 vote

Big list of journals with free access to back issues.

1 vote
Accepted

Determine the probability, Such that array A is sorted after applying exactly $N$ swap operations on array $A.$