User Rachid Atmai

5 votes

Accepted

Hilbert space $\mathcal{H}$ is separable if and only if $\mathcal{B}(\mathcal{H})$ is separable

answered Nov 24, 2020 at 17:57

4 votes

Find MacLaurin Series and radius of convergence

answered Nov 23, 2020 at 1:30

4 votes

Accepted

is there any difference between these three logarithms?

answered Nov 23, 2020 at 5:58

4 votes

Accepted

How should the relativized Kleene pointclass $\Sigma^1_1(A)$ be defined?

answered Apr 23, 2015 at 23:50

3 votes

Accepted

The notations $ M[X] $ and $ V[A] $ and intermediate models

answered Jul 3, 2015 at 3:53

3 votes

Accepted

Does $\{\alpha<\kappa\mid cf(\alpha)=\alpha\}\in D$?

answered Nov 14, 2017 at 5:27

3 votes

Riemann integrability of a piecewise function over $[1, 7]$

answered Dec 15, 2019 at 22:03

3 votes

Why the following function is closed?

answered Sep 7, 2020 at 22:08

3 votes

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On some doubts on tangent space of immersed submanifold

answered Nov 22, 2020 at 21:28

2 votes

Accepted

Introduction to Representation Theory Problem 1.26 part (a)

answered Sep 7, 2020 at 4:17

2 votes

Accepted

$P$ vs $NP$ characterization confusion

answered Sep 7, 2020 at 22:16

2 votes

Accepted

Is this $x^6 + x^5 + x^4 + x^3 + x^2 + x + 1$ irreducible in $\mathbb Q[x]$?

answered Nov 25, 2020 at 7:00

2 votes

Accepted

Order of continuity of product of two smooth functions

answered Aug 8, 2020 at 23:18

2 votes

$S\subset\mathbb{R}^3$ compact, orientable, not a sphere $\Rightarrow K$ has positive and negative values

answered Mar 19, 2018 at 1:52

2 votes

Is any immersed manifold also embedded?

answered Nov 22, 2020 at 21:34

2 votes

Visualize and solve $\int\int_D e^{y^2}dxdy$ with $D=\{x\geq 0$ , $x\leq y\leq 1\}$

answered Nov 29, 2019 at 5:50

2 votes

Proof for norm of sum of vectors is less/equal to sum of norm of vectors

answered Mar 19, 2018 at 5:48

2 votes

Non-stratified formulas which define sets in New Foundations?

answered Oct 9, 2013 at 23:20

1 vote

Describe four different elements of a union of power sets of power sets

answered Nov 15, 2013 at 10:29

1 vote

Accepted

Cardinality of all $\mathbf{\Sigma}^0_\alpha$-sets over Baire space without full choice

answered May 12, 2014 at 20:02

1 vote

Non analytic sets?

answered May 12, 2014 at 20:16

1 vote

Self-Dual Pointclass with a Universal Set?

answered Sep 13, 2015 at 23:48

1 vote

Measuring the set-theoretical complexity of sets/spaces encountered in general analysis

answered Sep 14, 2015 at 16:30

1 vote

Functions from $ \kappa $ to $ 2 $ ordered lexicographically

answered Jun 7, 2016 at 18:23

1 vote

Sketch level curve of $\frac{x^2}{x^2+y^2+1}$

answered Nov 8, 2018 at 2:55

1 vote

Second derivative of polar coordinates

answered Nov 8, 2018 at 2:45

1 vote

Accepted

Radius of convergence of $\sum_{n = 1}^ \infty n! z^n$

answered Nov 29, 2019 at 5:12

1 vote

Prove that $\mathbb{Z}[\sqrt{-2}]$ is a Euclidean domain and $\mathbb{Z}[\sqrt{-10}]$ is not

answered Sep 10, 2020 at 4:34

1 vote

Find the values of $a$ and $b$ / $ f(x) \; \text{is derivable} \; \forall x \in \Bbb R$

answered Aug 8, 2020 at 23:00

1 vote

Matrix reflection

answered Aug 9, 2020 at 1:49

Stack Exchange Network

53 Answers

Hilbert space $\mathcal{H}$ is separable if and only if $\mathcal{B}(\mathcal{H})$ is separable

Find MacLaurin Series and radius of convergence

is there any difference between these three logarithms?

How should the relativized Kleene pointclass $\Sigma^1_1(A)$ be defined?

The notations $ M[X] $ and $ V[A] $ and intermediate models

Does $\{\alpha<\kappa\mid cf(\alpha)=\alpha\}\in D$?

Riemann integrability of a piecewise function over $[1, 7]$

Why the following function is closed?

On some doubts on tangent space of immersed submanifold

Introduction to Representation Theory Problem 1.26 part (a)

$P$ vs $NP$ characterization confusion

Is this $x^6 + x^5 + x^4 + x^3 + x^2 + x + 1$ irreducible in $\mathbb Q[x]$?

Order of continuity of product of two smooth functions

$S\subset\mathbb{R}^3$ compact, orientable, not a sphere $\Rightarrow K$ has positive and negative values

Is any immersed manifold also embedded?

Visualize and solve $\int\int_D e^{y^2}dxdy$ with $D=\{x\geq 0$ , $x\leq y\leq 1\}$

Proof for norm of sum of vectors is less/equal to sum of norm of vectors

Non-stratified formulas which define sets in New Foundations?

Describe four different elements of a union of power sets of power sets

Cardinality of all $\mathbf{\Sigma}^0_\alpha$-sets over Baire space without full choice

Non analytic sets?

Self-Dual Pointclass with a Universal Set?

Measuring the set-theoretical complexity of sets/spaces encountered in general analysis

Functions from $ \kappa $ to $ 2 $ ordered lexicographically

Sketch level curve of $\frac{x^2}{x^2+y^2+1}$

Second derivative of polar coordinates

Radius of convergence of $\sum_{n = 1}^ \infty n! z^n$

Prove that $\mathbb{Z}[\sqrt{-2}]$ is a Euclidean domain and $\mathbb{Z}[\sqrt{-10}]$ is not

Find the values of $a$ and $b$ / $ f(x) \; \text{is derivable} \; \forall x \in \Bbb R$

Matrix reflection