Question

Approximation of smooth diffeomorphisms by polynomial diffeomorphisms?

score 306 · Answer 1 · 2026-03-25 15:39:19

306

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Approximation of smooth diffeomorphisms by polynomial diffeomorphisms?

Published on 25 Mar 2026 - 15:39

score 160 · Answer 2 · 2020-05-25 13:37:05

160

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What is exponential accuracy? How many types of accuracy are there?

Published on 25 May 2020 - 13:37

score 52 · Answer 3 · 2026-03-25 09:31:57

52

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How to construct the matrix of a 2-D system of differential equations

Published on 25 Mar 2026 - 9:31

score 48 · Answer 4 · 2026-03-26 11:18:31

48

Views

Maximum $n$ such that $e2^{1 - {k \choose 2}}{k \choose 2}{{n-2} \choose {k-2}} \leq 1$, as $k \to \infty$.

Published on 26 Mar 2026 - 11:18

score 165 · Answer 5 · 2020-06-09 15:21:47

165

Views

Bernstein polynomials $B_n$ of $f$ where $f$ is concave in $[0,1]$ are nondecreasing with $n$

Published on 09 Jun 2020 - 15:21

score 167 · Answer 6 · 2020-06-11 18:09:55

167

Views

Is a projection onto the span of polynomials also an interpolant?

Published on 11 Jun 2020 - 18:09

score 55 · Answer 7 · 2026-03-25 21:31:34

55

Views

If $d$ is a separable metric on a Banach space, approximate a $d$-Lipschitz function by Fréchet differentiable $d$-Lipschitz functions

Published on 25 Mar 2026 - 21:31

score 183 · Answer 8 · 2026-03-25 09:53:49

183

Views

How to prove that $\mathscr{H}$ is dense in $C_0$

Published on 25 Mar 2026 - 9:53

score 221 · Answer 9 · 2020-06-15 13:21:32

221

Views

An exercise about a quantitative version of the Riemann-Lebesgue lemma

Published on 15 Jun 2020 - 13:21

score 255 · Answer 10 · 2020-06-19 19:19:26

255

Views

How to recognize the Laplace transform of a function with compact support?

Published on 19 Jun 2020 - 19:19

score 233 · Answer 11 · 2026-03-25 22:03:06

233

Views

Approximating $\sin(x)$ on $[−1, 1]$ in $L^2$ with a second degree polynomial

Published on 25 Mar 2026 - 22:03

score 171 · Answer 12 · 2020-06-26 22:34:54

171

Views

approximate identity- common compact set

Published on 26 Jun 2020 - 22:34

score 153 · Answer 13 · 2026-03-25 17:21:45

153

Views

Is there a way to find a good/best/near-best approximation $p(x)\cdot\exp(-a\cdot x)$ ($p(x)$ is a polynomial) to a function $f(x)$?

Published on 25 Mar 2026 - 17:21

score 47 · Answer 14 · 2020-06-28 13:00:20

47

Views

How to carry out arithmetics with Bachmann–Landau notations?

Published on 28 Jun 2020 - 13:00

score 20 · Answer 15 · 2020-06-30 15:03:44

20

Views

Is this conclusion on orders of magnitude correct?

Published on 30 Jun 2020 - 15:03

List Question

Approximation of smooth diffeomorphisms by polynomial diffeomorphisms?

What is exponential accuracy? How many types of accuracy are there?

How to construct the matrix of a 2-D system of differential equations

Maximum $n$ such that $e2^{1 - {k \choose 2}}{k \choose 2}{{n-2} \choose {k-2}} \leq 1$, as $k \to \infty$.

Bernstein polynomials $B_n$ of $f$ where $f$ is concave in $[0,1]$ are nondecreasing with $n$

Is a projection onto the span of polynomials also an interpolant?

If $d$ is a separable metric on a Banach space, approximate a $d$-Lipschitz function by Fréchet differentiable $d$-Lipschitz functions

How to prove that $\mathscr{H}$ is dense in $C_0$

An exercise about a quantitative version of the Riemann-Lebesgue lemma

How to recognize the Laplace transform of a function with compact support?

Approximating $\sin(x)$ on $[−1, 1]$ in $L^2$ with a second degree polynomial

approximate identity- common compact set

Is there a way to find a good/best/near-best approximation $p(x)\cdot\exp(-a\cdot x)$ ($p(x)$ is a polynomial) to a function $f(x)$?

How to carry out arithmetics with Bachmann–Landau notations?

Is this conclusion on orders of magnitude correct?

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