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reviewed  Close Ky Fan norms and nuclear norm 
23h

reviewed  Leave Closed New algorithm discovered to find prime numbers 
Jan 22 
reviewed  Close Notation in groups/rings/fields 
Jan 20 
comment 
Mean value of Maass forms
@paulgarrett: Sure, that works too! (I wrote the first thing that came to mind.) 
Jan 20 
revised 
Mean value of Maass forms
added 100 characters in body 
Jan 20 
comment 
Mean value of Maass forms
@paul garrett: Once you approximate the characteristic function by $f$, just use Cauchy's inequality to bound $\langle \phi_j, f\chi_A \rangle$ by $\le \Vert f\chi_A\Vert$. (I edited that in to the answer) 
Jan 20 
revised 
Mean value of Maass forms
edited tags 
Jan 20 
answered  Mean value of Maass forms 
Jan 19 
comment 
Thin sequences with good counting properties
@juan When the $a_n$ are distinct, then from the conditions it follows that very few of the $a_n$ can be multiples of a prime $p$ with $p\le x^{1/10}$ say. But then the number of integers up to $x$ composed of primes larger than $x^{1/10}$ is $O(x/\log x)$. 
Jan 19 
comment 
Thin sequences with good counting properties
If the $a_n$ can have repeats, then you should just be able to repeat primes an appropriate number of times. If the $a_n$ are distinct, then there is no such sequence. Perhaps you could clarify the question. 
Jan 16 
awarded  Good Answer 
Jan 16 
reviewed  Leave Closed What is the value of $\sum\limits_{p≤x}\frac{1}{p^2}$? 
Jan 16 
reviewed  No Action Needed About the first decimal of $\sqrt {n!}$ 
Jan 16 
reviewed  No Action Needed Prime Number Theorem on APs under various conjectures 
Jan 16 
reviewed  Close Isolating x? Stupid question sorry 
Jan 16 
reviewed  No Action Needed Immersability and applications of a particular Riemannian metric 
Jan 14 
reviewed  Leave Closed TM and abstract algebra 
Jan 14 
awarded  Nice Answer 
Jan 14 
answered  Why does this sequence converges to $\pi$? 
Jan 14 
reviewed  Leave Closed How many of Ramanujan's discoveries have had a practical application? 