What is Continuity: Definition and 899 Discussions
In fiction, continuity is a consistency of the characteristics of people, plot, objects, and places seen by the reader or viewer over some period of time. It is relevant to several media.
Continuity is particularly a concern in the production of film and television due to the difficulty of rectifying an error in continuity after shooting has wrapped up. It also applies to other art forms, including novels, comics, and video games, though usually on a smaller scale. It also applies to fiction used by persons, corporations, and governments in the public eye.
Most productions have a script supervisor on hand whose job is to pay attention to and attempt to maintain continuity across the chaotic and typically non-linear production shoot. This takes the form of a large amount of paperwork, photographs, and attention to and memory of large quantities of detail, some of which is sometimes assembled into the story bible for the production. It usually regards factors both within the scene and often even technical details, including meticulous records of camera positioning and equipment settings. The use of a Polaroid camera was standard but has since been replaced by digital cameras. All of this is done so that, ideally, all related shots can match, despite perhaps parts being shot thousands of miles and several months apart. It is an inconspicuous job because if done perfectly, no one will ever notice.
In comic books, continuity has also come to mean a set of contiguous events, sometimes said to be "set in the same universe."
I am reading Houshang H. Sohrab's book: "Basic Real Analysis" (Second Edition).
I am focused on Chapter 4: Topology of R and Continuity ... ...
I need help in order to fully understand the proof of Theorem 4.3.4 ... ... Theorem 4.3.4 and its proof read as follows:
In the above proof by...
I am reading Houshang H. Sohrab's book: "Basic Real Analysis" (Second Edition).
I am focused on Chapter 4: Topology of R and Continuity ... ...
I need help in order to fully understand the proof of Theorem 4.3.4 ... ... Theorem 4.3.4 and its proof read as follows:
In the above proof by...
In my textbook when proving continuity implies uniform continuity (which is very similar to the proof given here), BWT is used to find a converging subsequence. I cannot see why this is needed. Referring to the linked proof, if we open up the inequality ##|x_n-y_n|<\frac{1}{n}##, isn't by the...
I understand that from local conservation of charge, we get eqn. 8.4. I don't get why it is called continuity eqn. What is continuous in it?
Conservation of momentum gives us equation, ## \frac {d\vec p }{dt} = \vec F ##. This equation is not called continuity equation. Can we get a continuity...
Now, there's this conventional definition of the Hölder continuity of a function ##f## defined on ##[a,b]\subset\mathbb{R}##:
For some real numbers ##C>0## and ##\alpha >0##, and any ##x,y\in [a,b]##, ##|f(x) - f(y)|<C|x-y|^{\alpha}##.
However, this does not include functions like ##f(x) =...
I'm finishing my master studies in Theoretical Physics and my thesis is being about entanglement measures. I've read several papers in which all kind of properties that one would desire to have in a good entanglement measure are exhibit. One of these properties that one would consider...
I know how Gauss law helps us to calculate the discontinuity at a point on the surface of a surface charge.
Similarly using Gauss law, is there a way to determine the continuity at other points of electric field due to a surface charge or the continuity at all points of electric field due to a...
Consider a magnetic dipole distribution in space having magnetization ##\mathbf{M}##. The potential at any point is given by:
##\displaystyle\psi=\dfrac{\mu_0}{4 \pi} \int_{V'} \dfrac{ \rho}{|\mathbf{r}-\mathbf{r'}|} dV' + \dfrac{\mu_0}{4 \pi} \oint_{S'}...
according to continuity equation (partial ρ)/(partial t) +divergence J = 0 . there is such a situation that there is continuous water spreads out from the center of a sphere with unchanged density ρ, and at the center dm/dt = C(a constant), divergence of J = ρv should be 0 anywhere except the...
This is not so much a "Homework" question I am just giving an example to ask about a specific topic.
Homework Statement
Is ##f(t,y)=e^{-t}y## Lipschitz continuous in ##y##
Homework Equations
I don't really know what to put here. Here is the definitions...
Homework Statement
Let ##f:X\rightarrow Y## with X = Y = ##\mathbb{R}^2## an euclidean topology.
## f(x_1,x_2) =( x^2_1+x_2*sin(x_1),x^3_2-sin(e^{x_1+x_2} ) )##
Is f continuous?
Homework Equations
f is continuous if for every open set U in Y, its pre-image ##f^{-1}(U)## is open in X.
or if...
Homework Statement
We've been given a set of hints to solve the problem below and I'm stuck on one of them
Let f:[a,b]->R , prove, using the hints below, that if f is continuous and if f(a) < 0 < f(b), then there exists a c ∈ (a,b) such that f(c) = 0
Hint
let set S = {x∈[a,b]:f(x)≤0}
let c =...
Why can't G and its derivative be continuous in the relation below?
$$p(x)\dfrac{dG}{dx} \Big|_{t-\epsilon}^{t+\epsilon} +\int_{t-\epsilon}^{t+\epsilon} q(x) \;G(x,t) dx = 1$$
Hey Guys, I posed this on Math Stackexchange but no one is offering a good answering. I though you guys might be able to help :)
https://math.stackexchange.com/questions/3049661/single-point-continuity-spivak-ch-6-q5
Homework Statement
"Show that if ##P(X=c)>0##, for some ##c\in \mathbb{R}##, then the distribution function ##F_X(x)=P(X\leq x)## is discontinuous at ##c##. Is the converse true?"
Homework Equations
Continuity of a distribution function: ##\lim_{\epsilon \rightarrow 0}F_X(x+\epsilon)=F_X(x)##...
Hello,
I recently wrote a test for an introductory calculus class and was confused by the grading of one of the questions regarding continuity. I have attached a screenshot of the test question and my work below. There was a comment reading "Continuity for all x ≠ 1?" and I was deducted marks as...
Homework Statement
Determine if the following function is continuous: f(x) = (x-iy)/(x-1)
Homework Equations
How do find out if a function is continuous without graphing it and without a point to examine? I know I've learned this, probably in pre-calculus too, but I'm blanking
The Attempt at...
use the definition of continuity and the properties of limits to show that the function is continuous at the given number $a$
$$g(t)=\frac{t^2+5t}{2t+1}\qquad a=1$$
ok i assume we just plug in a for t
$$\frac{1^2+5(1)}{2(1)+1)}=\frac{6}{3}=2$$
theorem 4 if f and g are continuous at a and if c...
Hi guys , i am working in the automotive industry today i encountered a weird electrical issue and i am sure you guys have an explanation , i was using my multimeter to check continuity between different stuff , by mistake i put the leads on the car battery terminals i found the multimeter...
Can we apply continuity equation between the given two cases?
The only difference in the second case is that the pipe of diameter d2 is replaced by a pipe of diameter d3.
Will the mass flow rate be same for both the cases.
Can quantum cellular automata/quantum game of life simulate quantum continuous processes in the continuous limit?
At the end of this article: https://hal.archives-ouvertes.fr/hal-00542373/document
it is said that: "For example, several works simulate quantum field theoretical equations in the...
Homework Statement
Let ##p\in\Bbb{R}##. Then the function ##f:(0,\infty)\rightarrow \Bbb{R}## defined by ##f(x):=x^p##. Then ##f## is continuous.
I need someone to check what I've done so far and I really need help finishing the last part. I am clueless as to how to show continuity for...
Hello everyone!
I'm a student of electrical engineering, preparing for the theoretical exam in math which will cover stuff like differential geometry, multiple integrals, vector analysis, complex analysis and so on. So the other day I was browsing through the required knowledge sheet our...
So we know that we typically have to use epsilon delta proofs for determining a limit of a multivariable function because there are infinite paths. But can we use removable discontinuities to prove a limit?
Say we want to evaluate the lim( x^2-y^2)/(x+y) as (x,y)->(0,0).
we can factor as...
Hey! :o
Let $C[0,1]$ and $C^1[0,1]$ be the space of continuous and continuously differentiable (respectively) functions $x:[0,1]\rightarrow \mathbb{R}$ with the supremum norm $\displaystyle{\|x\|=\sup_{t\in [0,1]}|x(t)|}$ and $T_0, T_1, T_2: C^1[0,1]\rightarrow C[0,1]$ maps with...
Homework Statement
Prove that ##f(x) = \frac{1}{x}## is continuous using the epsilon-delta definition of continuity.
Homework EquationsThe Attempt at a Solution
We will assume that the domain of ##f## is ##\mathbb{R} / \{ 0\}##. Let ##x_0## be in the domain. First, we look at ##\displaystyle...
Hi there,
So I was doing the dishes this morning using a sink wand hat can toggle between different flow speeds. The way that I've always thought of this working is using the equation of continuity:
Volume flow rate: = Area*velocity
Pressing a button on the wand decreases the cross-sectional...
Homework Statement
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We have a function f(x) = |cos(x)|.
It's written that it is piecewise continuous in its domain.
I see that it's not "smooth" function, but why it is not continuous function - from the definition is should be..Homework Equations
[/B]
We say that a function f is...
Differentialbility & Continuity of Multivariable Vector-Valued Functions ... D&K Lemma 2.2.7 ...
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ...
I am focused on Chapter 2: Differentiation ... ...
I need help with an aspect of the...
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ...
I am focused on Chapter 2: Differentiation ... ...
I need help with an aspect of the proof of Lemma 2.2.7 (Hadamard...) ... ...
Duistermaat and Kolk's Lemma 2.2.7 and its proof read as...
Existence of Partial Derivatives and Continuity ... Kantorovitz's Proposition pages 61-62 ...
I am reading the book "Several Real Variables" by Shmuel Kantorovitz ... ...
I am currently focused on Chapter 2: Derivation ... ...
I need help with another element of the proof of Kantorovitz's...
I am reading the book "Several Real Variables" by Shmuel Kantorovitz ... ...
I am currently focused on Chapter 2: Derivation ... ...
I need help with another element of the proof of Kantorovitz's Proposition on pages 61-62 ...
Kantorovitz's Proposition on pages 61-62 reads as follows:
In the...
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ...
I am focused on Chapter 1: Continuity ... ...
I need help with an aspect of the proof of Theorem 1.8.15 ... ...
Duistermaat and Kolk's Theorem 1.8.15 and its proof read as follows:In...
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ...
I am focused on Chapter 1: Continuity ... ...
In Definition 1.3.4 D&K define continuity and then go on to define Lipschitz Continuity in Example 1.3.5 ... ... (see below for these...
I am reading "Multidimensional Real Analysis I: Differentiation" by J. J. Duistermaat and J. A. C. Kolk ...
I am focused on Chapter 1: Continuity ... ...
I need help with an aspect of the proof of Theorem 1.8.8 ... ...
Duistermaat and Kolk's Theorem 1.8.8 and its proof read as follows:In the...
Hi PF!
In fluids I've noticed many authors use the continuity equation with an integral form of conservation of volume (assume density is constant). Is this double counting? Example: let fluid velocity inside an idle bubble be ##\vec u = \nabla \phi##. Conservation of mass implies ##\nabla u =...
Hey! :o
I want to show that the function $f:\mathbb{R}\rightarrow \mathbb{R}$ with $f(x)=\sqrt{4+x^2}$ is continuous on $\mathbb{R}$ using the $\epsilon$, $\delta$-definition.
We have the following:
To show the continuity of $f$ we have to prove the continuity at each point $\displaystyle...
Homework Statement
Could somebody link me to a youtube video explaining this topic, its from an exam paper at me college and I can't find notes on it.It think it has something to do with limits. Many thanks.
Homework Statement
Find ##f:R \to X##, f-continuous, where X is the discrete space.
Homework EquationsThe Attempt at a Solution
f is continuous at p if for any ##\epsilon > 0## there is ##\delta >0## such that ##d(f(x),f(p))<\epsilon## for all x such that ##d(x,p)<\delta##. Let ##\epsilon =...
\chapter{Sensitivity Analysis}
The first step in our method to obtain the sensitivity of each parameter value is to differentiate the right hand side of each model with respect to each model parameter. The partial derivatives for the right hand side of our linear response model...
I am reading Bruce P. Palka's book: An Introduction to Complex Function Theory ...
I am focused on Chapter 3: Analytic Functions ...
I need help with some aspects of Example 1.5, Chapter 3 ...
Example 1.5, Chapter 3 reads as follows:
In the above text from Palka Chapter 3, Section 1.2 we...
Homework Statement
Let ##X## and ##Y## be topological spaces, and let ##\{U_i\}## be a collection of open sets in ##X##. If ##X = \bigcup U_i## and ##f|_{U_i}## is continuous, then ##f : X \to Y## continuous.
Homework EquationsThe Attempt at a Solution
Let ##x \in X##, and let ##V \subseteq...
I am reading Bruce P. Palka's book: An Introduction to Complex Function Theory ...
I am focused on Chapter 2: The Rudiments of Plane Topology ...
I need help with some aspects of the proof of Lemma 2.4 ... Lemma 2.4 and its proof reads as follows:
My questions are as follows:
Question 1...
Homework Statement
f(x+y) = f(x) + f(y) for all x,y∈ℝ if f is continuous at a point a∈ℝ then prove that f is continuous for all b∈ℝ.
Homework Equations
lim{x->a}f(x) = f(a)
The Attempt at a Solution
I do not understand how to prove the continuity, does f(x) = f(a) or does f(x+y) = f(a)
Homework Statement
Prove the continuity from below theorem.
Homework EquationsThe Attempt at a Solution
So I've defined my {Bn} already and proven that it is a sequence of mutually exclusive events in script A. I need to prove that U Bi (i=1 to infinity) is equal to U Ai (i=1 to infinity) to...
This is something I seek a proof of.
Theorem: Let ## \mbox{det}:\mbox{Mat}_{n\times n}(\mathbb{R}) \rightarrow \mathbb{R}## be the determinant function assigned to a general nxn matrix with real entries. Prove this mapping is continuous.
My attempt. Continuity must be judged in...
I am reading "Introduction to Real Analysis" (Fourth Edition) by Robert G Bartle and Donald R Sherbert ...
I am focused on Chapter 5: Continuous Functions ...
I need help in fully understanding an aspect of Example 5.4.6 (b) ...Example 5.4.6 (b) ... ... reads as follows:
In the above text...
I am reading Manfred Stoll's Book: "Introduction to Real Analysis" ... and am currently focused on Chapteer 4: Limits and Continuity ...
I need some help with an inequality involving absolute values in Example 4.1.2 (a) ...
Example 4.1.2 (a) ... reads as follows:
In the above text we read ...
I am reading Manfred Stoll's Book: "Introduction to Real Analysis" ... and am currently focused on Chapteer 4: Limits and Continuity ...
I need some help with an inequality involving absolute values in Example 4.1.2 (a) ... Example 4.1.2 (a) ... reads as follows:In the above text we read ...