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AnabolicHorse
  • Member for 3 years, 2 months
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5 votes
1 answer
218 views

applying Chinese Remainder Theorem

5 votes
2 answers
100 views

Why is the map $\mathrm{SL}_2(\mathbb{R})/\mathrm{SO}(2) \rightarrow \mathbb{H} : A \mapsto Ai$ injective?

4 votes
1 answer
637 views

Norm of ideals in the ring of integers

3 votes
2 answers
1k views

Calculating the discriminant

3 votes
2 answers
116 views

Definition of modular forms

2 votes
0 answers
92 views

class number of $\mathbb{Q}(\sqrt{17})$ [duplicate]

2 votes
0 answers
54 views

How to split this sum into a double sum.

2 votes
1 answer
32 views

Why are the coefficients zero if $n$ contains a prime with prime power $1$ that is not split in $K$?

2 votes
1 answer
115 views

Is each prime ideal in a quadratic field of norm $p$ or $p^2$?

2 votes
2 answers
541 views

How to split the polynomial . [closed]

2 votes
1 answer
192 views

splitting primes

2 votes
1 answer
77 views

understanding the definition of Q lies over p

2 votes
2 answers
53 views

Why does the congruence hold?

1 vote
1 answer
69 views

Understanding the proof

1 vote
0 answers
74 views

Show that the action of $PSL_2(\mathbb{R})$ on $\mathbb{H}$ is transitive [duplicate]

1 vote
0 answers
42 views

Why are these matrices coset representatives for $\Gamma_0(2)$ in $SL_2(\mathbb{Z})$?

1 vote
0 answers
74 views

Understanding the proof .

1 vote
1 answer
61 views

Why is $f_\epsilon(u) \in H_0^{1,2}(\Omega)$?

1 vote
0 answers
43 views

$u \in W_0^{1,2}(\Omega) \Rightarrow |u| \in W_0^{1,2}(\Omega)$

1 vote
1 answer
44 views

Why is $f_\epsilon(u) \in W_0^{1,2}(\Omega)$?

1 vote
1 answer
65 views

if $\alpha $ is transcendental , there is no way to write $\frac{1}{\alpha}$ as a polynomial in $\alpha$.

1 vote
1 answer
43 views

Other formulation for the discriminant

1 vote
1 answer
42 views

calculating the index

1 vote
1 answer
49 views

showing isomorphism

1 vote
0 answers
70 views

Trivial class group

1 vote
1 answer
62 views

How to calculate the Minkowski bound .

1 vote
1 answer
92 views

Is this number an algebraic integer over $\mathbb{Z}$?

1 vote
1 answer
48 views

showing that $R_k f =2if'+ky^{-1}f$ is a modular form of weight $k+2$ .

1 vote
1 answer
135 views

In $SL_2(\mathbb{Z}))$ , why is $\Gamma$ a congruence subgroup of index $3$?

1 vote
0 answers
43 views

Understanding the proof of (b)