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83
Quotient ring of Gaussian integers
math.stackexchange.com

32
Need a result of Euler that is simple enough for a child to understand
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31
Prove $\gcd(a+b, a-b) = 1$ or $2\,$ if $\,\gcd(a,b) = 1$
math.stackexchange.com

29
Mandelbrot fractal: How is it possible?
math.stackexchange.com

18
Fibonacci sequence divisible by 7?
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17
Irrationality proofs not by contradiction
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15
The $5n+1$ Problem
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13
'is odd' / 'is even' notation
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13
List of Local to Global principles
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12
List of Local to Global principles
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12
Sum of cubed roots
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9
Convergence of $a_{n+1}=\frac{1}{1+a_n}$
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9
Is there any mathematical operation on Integers that yields the same result as doing bitwise “AND”?
math.stackexchange.com

9
Which book would you like to see “texified”?
mathoverflow.net

8
Show that if $a \equiv b \pmod n$, $\gcd(a,n)=\gcd(b,n)$
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8
Proving divisibility
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8
Why prove that multiplicative functions are a group with Dirichlet convolution?
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8
Is this a known algebraic identity: $ (a + P \sqrt{t})^n \times (a - P \sqrt{t})^n = 1 $?
math.stackexchange.com

8
Three-variable system of simultaneous equations
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7
Motivation for the Math Required for Computer Science
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7
List of Local to Global principles
math.stackexchange.com

7
Alternative notation for exponents, logs and roots?
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6
Show that the ideal $ (2, 1 + \sqrt{-7} ) $ in $ \mathbb{Z} [\sqrt{-7} ] $ is not principal
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6
How do we know that there is a function from $\mathbb{N}$ to $\mathbb{N}$ that is not partial computable?
math.stackexchange.com

6
If $ab \equiv r \pmod{p}$, and $x^2 \equiv a \pmod{p}$ then $y^2 \equiv b \pmod{p}$ for which condition of $r$?
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6
Subtraction and division with integers modulo 3
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5
Prove that $x^{2} \equiv 1 \pmod{2^k}$ has exactly four incongruent solutions
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5
Solving for a variable that's an exponent
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5
Derivative question
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5
Biquadratic Extension
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