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repelling

▪ I. reˈpelling, vbl. n. (rɪˈpɛlɪŋ) [f. repel v. + -ing1.] The action of the vb.; repulse.1533 Bellenden Livy ii. xiv. (S.T.S.) I. 183 Valerius left þe said auctorite for [þe] Indignacioun þat he tuke in his mynde for þe repelling of his petitiouns. 1611 Cotgr., Repoulsement, a repulsing, repelling.... Oxford English Dictionary

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Portland, 'repelling its current citizens,' is ... - The Seattle Times

Feb 4, 2023Our littler sister city has been careening far ahead of us in grown-up, post-pandemic urban problems. And also in how bluntly it has begun talking about how the bloom has come off the Rose City ...

www.seattletimes.com

14 Ant-Repelling Plants That Naturally Deter the Bitty Bugs

Aug 30, 2023When it comes to ants, humans are outnumbered by about 2.5 million to one. With more than 15-thousand species almost everywhere on earth, ants are eventually bound to show up in a place where you don't want them, from your home to your prized plants.. The key to deterring ants naturally with plants relies primarily on scent. These insects have four to five times as many scent receptors in ...

www.thespruce.com

List of pest-repelling plants

Table of pest-repelling plants Plants that can be planted or used fresh to repel pests include: References pest-repelling plants + Insect repellents pest-repelling plants pest-repelling plants wikipedia.org

en.wikipedia.org

Sketching a discrete-time dynamical system with a repelling period-2 orbit > Sketch the graph of a continuous function which has an attracting fixed point and a repelling period-2 orbit. I am having a hard time tryin...

.$$ Thus, if $f'(x_2)$ and $f'(x_1)$ are both larger than one in absolute value, then the same will be true for $F$ and the orbit will be repelling.

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Bounded sequence with repelling terms I was wondering: Is it possible to construct a bounded sequence $\\{a_n\\}$ of real numbers satisfying $|a_n-a_{n+k}| > 1/k \, \forall k \geq 1$? I've tried to come up with such a...

Yes. Perhaps the simplest example is: $$a_n\equiv n\;(\\!\\!\\!\\!\\!\\!\mod\\! \alpha)\quad\text{with}\quad0\leqslant a_n2$. A proof of this can be found in my paper "How slowly can a bounded sequence cluster?", published in _Functiones et Approximatio_ **46** (2), pp. 195--204 (2012). Another, rat...

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How to prove that 2/9 is repelling point of period 3 to the Tent function? Let $$ T(x)=\begin{cases} 2x & 0\leq x\leq 1/2 \\\ 2-2x & 1/2\leq x\leq 1 \end{cases} $$ How to prove that 2/9 is repelling point of period 3 ...

<\frac29<\frac14$, $$T^3(x)=2-8x$$ on that interval, again giving evidence to the fixed point at $\frac29$ and that the slope there is $-8$, which is repelling

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Fixed points and dynamics of $x-x^2$, $x+x^3$, $x-x^3$ and $\tan x$ For each of the following functions, show that $0$ is a fixed point, and the derivative of the function is $1$ at $x=0$. Describe the dynamics of poi...

slightly to the left of $0$) gets mapped to $f(-\epsilon)-\epsilon -\epsilon^2<-\epsilon$ are being forced _away_ from $0$, so it does half attracting, half repelling procedure getting $f(\epsilon)=\epsilon+\epsilon^3>\epsilon$ and $f(-\epsilon) = -\epsilon -\epsilon^3<-\epsilon$ both push away from $0$ which makes it a repelling

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Estimating $n_0$ such that $f^n (x) \in [1+2\sigma, \infty)$, $\forall\ n>n_0$. Where $f(x) = x^3 + \frac{2}{3 \sqrt{3}} + \varepsilon$. Let $\varepsilon>0$ be a real number and $f_{\varepsilon}:\mathbb{R}\to \mathbb{...

For $x>0$, the minimum of $g_\epsilon(x) = f_\epsilon(x)-x$ is attained at $x=\frac{1}{\sqrt3}$ and its value is equal to $\epsilon$. Therefore, $$f_\epsilon(x)\ge x +\epsilon$$ for $x >0$. Based on this inequality, you get by induction $$\Phi_\epsilon(n,x) \ge n\epsilon$$ And you’re done by picking...

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CN203563591U - Solar bird repelling device - Google Patents

A solar bird repelling device is mainly composed of a driver and a bird repelling stick, wherein the driver and the bird repelling stick are arranged on a voltage class overhead line tower. The driver comprises at least one solar electric generation board fixed to a plastic outer cover, and a brush-free motor and a control circuit board are at least arranged in the plastic outer cover.

patents.google.com

is it ever possible for a sequence of real-valued smooth, non-diffeomorphic functions in $\mathbb{R}$ to jump across a repulsive fixed-point? Let's say we have a real-valued smooth function $f(x)$, not diffeomorphic, ...

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Negative order differential equations Are algebraic solutions for a function y(x) fulfilling this differential equation possible? \begin{equation} \text{y}^{-2}= \frac{\text{d}^2\text{y}}{\text{dx}^2} \end{equation} ...

**Just a hint** The differential equation can be written as $$\frac {y'}{y^2}=y' y''$$ and after integration $$\frac {-1}{y}=\frac {1}{2}(y')^2+C$$

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Fast algorithm for computing forces between $n$ point in the plane I have a set of distinct particles $\\{z_k\\}_{k=1}^n\subseteq\mathbb{R}^2$ with dynamics $$\dot{z_k} = \sum_{k'\not= k}V(z_k-z_{k'}),$$ where $V$ i...

This paper seems quite relevant: > A Fast Adaptive Multipole Algorithm for Calculating Screened Coulomb (Yukawa) Interactions, _Journal of Computational Physics_ Volume 151, Issue 1, 1 May 1999, Pages 212-241

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Differential equations, stability of fixed points Consider the differential equations: $$\dot{x}=x^2-9$$ $$\dot{x}=x(x-1)(2-x)=-x^3+3x^2-2x$$ a. Find the stability type of each fixed point. (I am not sure about th...

Excellent work on parts a and b! You're spot on, all the way. The idea for graphing is to let $t$ be your independent variable (that is, what is usually the "$x$-axis") and let $x$ be your dependent variable (that is, what is usually the "$y$-axis"), then graph as normal. Now, the key word in this i...

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Spray new bike with teflon to repel dirt and moisture? I'm getting a new road bike. Would a light spritz of teflon spray help in repelling dirt and moisture? I wouldn't coat it completely, just focus on those dirt col...

I've used the teflon spray on my cross bike before, especially when it was new, it seems to keep the dirt away for a short period of time, but only a few days. After that it's back to the usual dirt and moisture build up, what seems like more than you can tolerate when you stil want your bike to fee...

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repelling

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repelling

Portland, 'repelling its current citizens,' is ... - The Seattle Times

14 Ant-Repelling Plants That Naturally Deter the Bitty Bugs

List of pest-repelling plants

Sketching a discrete-time dynamical system with a repelling period-2 orbit > Sketch the graph of a continuous function which has an attracting fixed point and a repelling period-2 orbit. I am having a hard time tryin...

Bounded sequence with repelling terms I was wondering: Is it possible to construct a bounded sequence $\\{a_n\\}$ of real numbers satisfying $|a_n-a_{n+k}| > 1/k \, \forall k \geq 1$? I've tried to come up with such a...

How to prove that 2/9 is repelling point of period 3 to the Tent function? Let $$ T(x)=\begin{cases} 2x & 0\leq x\leq 1/2 \\\ 2-2x & 1/2\leq x\leq 1 \end{cases} $$ How to prove that 2/9 is repelling point of period 3 ...

Fixed points and dynamics of $x-x^2$, $x+x^3$, $x-x^3$ and $\tan x$ For each of the following functions, show that $0$ is a fixed point, and the derivative of the function is $1$ at $x=0$. Describe the dynamics of poi...

Estimating $n_0$ such that $f^n (x) \in [1+2\sigma, \infty)$, $\forall\ n>n_0$. Where $f(x) = x^3 + \frac{2}{3 \sqrt{3}} + \varepsilon$. Let $\varepsilon>0$ be a real number and $f_{\varepsilon}:\mathbb{R}\to \mathbb{...

CN203563591U - Solar bird repelling device - Google Patents

is it ever possible for a sequence of real-valued smooth, non-diffeomorphic functions in $\mathbb{R}$ to jump across a repulsive fixed-point? Let's say we have a real-valued smooth function $f(x)$, not diffeomorphic, ...

Negative order differential equations Are algebraic solutions for a function y(x) fulfilling this differential equation possible? \begin{equation} \text{y}^{-2}= \frac{\text{d}^2\text{y}}{\text{dx}^2} \end{equation} ...

Fast algorithm for computing forces between $n$ point in the plane I have a set of distinct particles $\\{z_k\\}_{k=1}^n\subseteq\mathbb{R}^2$ with dynamics $$\dot{z_k} = \sum_{k'\not= k}V(z_k-z_{k'}),$$ where $V$ i...

Differential equations, stability of fixed points Consider the differential equations: $$\dot{x}=x^2-9$$ $$\dot{x}=x(x-1)(2-x)=-x^3+3x^2-2x$$ a. Find the stability type of each fixed point. (I am not sure about th...

Spray new bike with teflon to repel dirt and moisture? I'm getting a new road bike. Would a light spritz of teflon spray help in repelling dirt and moisture? I wouldn't coat it completely, just focus on those dirt col...