Image of the unit square under linear transformation

How to evaluate $\int_{0}^{\infty }\frac{x^{4}e^{-2x^{2}}}{\left ( 1+x^{2} \right )^{4}}\mathrm{d}x$

What is a square root?

Is there a name for a group having a normal subgroup for every divisor of the order?

Why is $Set$ not equivalent to $Set^{op}$?

If $X_n$ converges in distribution to $X$, is it true that $\alpha_n X_n$ converges to $ \alpha X$ as well?

possible eigenvalues of $A$

Is there a simple way of proving that $\text{GL}_n(R) \not\cong \text{GL}_m(R)$?

Period of trigonometric function $f(x)=\cos(ax) + \sin(bx)$

When can we say elements of tensor product are equal to $0$?

Proof Fibonacci derivation

Multiple Nested Radicals

Show that (p ∧ q) → (p ∨ q) is a tautology?

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