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2d
reviewed Approve $A\subseteq \{1,2,3, \ldots 2000\}, $ and for any $a,b\in A,\; |a-b|$ is not equal to 4 or 7,
Jan
7
reviewed Approve Number of squares in $(\mathbb{Z}/p\mathbb{Z})^\times$
Jan
7
reviewed Edit Number of squares in $(\mathbb{Z}/p\mathbb{Z})^\times$
Jan
1
reviewed Leave Open Prove: for all $n$ there's a $m$ such that the sum of digits in $mn$ is equal to $n$.
Jan
1
reviewed Leave Open Arithmetic mean, geometric mean, and vieta's formulas
Dec
20
reviewed Leave Open For $E \subset \mathbb{R}$ and $\epsilon >0$, $\exists$ $(a,b)$ s.t. $\theta(E \cap (a,b)) \geq (1-\epsilon)|b-a|$ ($\theta$ Lesbegue Outer Measure)
Dec
20
reviewed Close Why field of fractions of $k[x_1,x_2,…]$ is Noetherian?
Dec
14
reviewed Approve Simplifying Permutations
Nov
20
reviewed Approve How many zeros does $f(x)= 3x^4 + x + 2 $ have?
Nov
8
reviewed Approve Proof $(1+1/n)^n$ is an increasing sequence
Nov
7
reviewed Approve Subgroup of prime order which is normal
Nov
2
reviewed Approve How many people play basketball?
Oct
14
reviewed No Action Needed Are fiber products in the category of locally ringed spaces always fiber products in the category of schemes?
Jun
19
reviewed Reject Idempotent operators over the exterior algebra
Jun
2
reviewed Approve Creating groups with 10 men and 10 women.
Jun
1
reviewed Approve applications of the identity $ab + \left(\frac{a+b}{2} - b\right)^2 = \left(\frac{a+b}{2}\right)^2$
May
19
reviewed Approve Evaluate $\displaystyle\int{\frac{e^{2x}} {\sqrt{1-e^x}}}\ dx$
May
4
reviewed Approve GCD and LCM Problem
May
3
reviewed Approve Inverse of this $3$-by-$3$ matrix using the Cayley–Hamilton theorem
Apr
30
reviewed Approve The Deck of cards!