User eraldcoil

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Showing affine transformations group generated by $2x$ and $x+1$ is the Baumslag-Solitar group.

answered Dec 14, 2018 at 6:19

1 vote

Calculating the value of a triple integral with a function and its inverse

answered Jan 20, 2022 at 7:09

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Is there any relationship between the operator $\partial_z.\, (z=x+iy\in \mathbb{C})$ and $\partial_x,\, \partial_y$?

answered Aug 7, 2022 at 19:07

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Calculating the product of the exponential application using the Baker-Campbell formula

answered Jul 5 at 17:28

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Dual of Sobolev space $H^{s}(\mathbb{R}^n)$ Taylor Michael.

answered Jun 16, 2019 at 23:34

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Showing that $(1+|x|^2e^{|x|^2})^{-1}$ is polinomially bounded.

answered Aug 16, 2019 at 5:58

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Showing that the generator of the semigroup $(e^{tA})_{t\in\mathbb{R}}$ is $A$.

answered Jul 20, 2021 at 21:20

0 votes

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Let $G$ be a group of order $34$ and $H$, a subgroup of $G$ not normal in $G$. Then $H$ has order $2$.

answered Aug 5, 2021 at 6:31

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Calculating the dimension of symmetric matrices.

answered Aug 18, 2021 at 15:43

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Lemma 7.20 "Pseudo differential and singular integral operators" by Helmut Abels

answered Sep 2, 2021 at 8:32

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Exercise 2.51 H. Abels. Pseudo differential and singular integral operator an introduction with applications

answered May 12, 2021 at 7:38

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Rational roots theorem on a polynomial with coefficients rationals.

answered Jun 4, 2021 at 5:57

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Dilatation of a measurable set is a measurable set.

answered Dec 6, 2018 at 22:28

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Polya's representation (Boas Book)

answered Jun 13 at 22:42

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For each $X\in G_{e}$, exists a unique smooth homomorphism $\phi:\mathbb{R}\to G$ with $\phi'(0)=X$ (Spivak)

answered Jun 19, 2022 at 18:04

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Showing an inequality of a complex exponential function

answered Jan 15, 2019 at 19:33

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16 Answers

Showing affine transformations group generated by $2x$ and $x+1$ is the Baumslag-Solitar group.

Calculating the value of a triple integral with a function and its inverse

Is there any relationship between the operator $\partial_z.\, (z=x+iy\in \mathbb{C})$ and $\partial_x,\, \partial_y$?

Calculating the product of the exponential application using the Baker-Campbell formula

Dual of Sobolev space $H^{s}(\mathbb{R}^n)$ Taylor Michael.

Showing that $(1+|x|^2e^{|x|^2})^{-1}$ is polinomially bounded.

Showing that the generator of the semigroup $(e^{tA})_{t\in\mathbb{R}}$ is $A$.

Let $G$ be a group of order $34$ and $H$, a subgroup of $G$ not normal in $G$. Then $H$ has order $2$.

Calculating the dimension of symmetric matrices.

Lemma 7.20 "Pseudo differential and singular integral operators" by Helmut Abels

Exercise 2.51 H. Abels. Pseudo differential and singular integral operator an introduction with applications

Rational roots theorem on a polynomial with coefficients rationals.

Dilatation of a measurable set is a measurable set.

Polya's representation (Boas Book)

For each $X\in G_{e}$, exists a unique smooth homomorphism $\phi:\mathbb{R}\to G$ with $\phi'(0)=X$ (Spivak)

Showing an inequality of a complex exponential function