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zed111
  • Member for 10 years, 7 months
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5 votes
2 answers
1k views

Prove that $89|2^{44}-1$ [duplicate]

4 votes
2 answers
833 views

Infinite number of pairs of distinct integers $(m,n)$ such that $\sigma(m^2)=\sigma(n^2)$

3 votes
0 answers
182 views

Simplifying a Vector Integral

2 votes
2 answers
245 views

Ratio of area formed by transformed and original sides of a parallelogram

2 votes
1 answer
1k views

Prove that $\Bbb{Z}[i]/I$ is finite where I is an ideal of $\Bbb{Z}[i]$

2 votes
1 answer
122 views

When can we write $f(v)dv=f(E)dE$?

1 vote
0 answers
47 views

Problem solving a PDE using separation of variables and Fourier expansion

1 vote
2 answers
66 views

Prove that $(\cap H_i) a= \cap Ha_i$

1 vote
1 answer
592 views

Finite Difference Method Stability with diffusion equation

1 vote
0 answers
358 views

Lyapunov Exponent for Logistic map $x_{n+1}=bx_n(1-x_n)$

1 vote
1 answer
226 views

proof that all subgroups of $\mathbb{Z}$ are of the form $H = b\mathbb{Z}$

0 votes
1 answer
2k views

Prove that $(AB)C = A(BC)=ABC$ for ideals $A, B, C$

0 votes
1 answer
72 views

Integrating $\prod_{i=k+1}^{kN} \left(\int_{-\infty}^{\infty}dp_i\right)\times$ with conditions on $p_i$