
Continuous vs Discrete Variables - Mathematics Stack Exchange
Dec 14, 2025 · Both discrete and continuous variables generally do have changing values—and a discrete variable can vary continuously with time. I am quite aware that discrete variables are those …
real analysis - Are Continuous Functions Always Differentiable ...
Oct 26, 2010 · An interesting fact is that most (i.e. a co-meager set of) continuous functions are nowhere differentiable. The proof is a consequence of the Baire Category theorem and can be found (as an …
How does the existence of a limit imply that a function is uniformly ...
Then the theorem that says that any continuous function on a compact set is uniformly continuous can be applied. The arguments above are a workaround this.
Eigenvalues are continuous? - Mathematics Stack Exchange
These functions aren't even defined, I don't see how they could be continuous. What is true is that the set of eigenvalues is continuous (for the right topology on the power set).
Difference between continuity and uniform continuity
Jan 27, 2014 · To understand the difference between continuity and uniform continuity, it is useful to think of a particular example of a function that's continuous on $\mathbb R$ but not uniformly …
real analysis - How do I show that all continuous periodic functions ...
Apr 30, 2014 · Show that every continuous periodic function is bounded and uniformly continuous. For boundedness, I first tried to show that since the a periodic function is continuous, it is continuous for …
Is the set of non-differentiable points for a singular continuous ...
In view of the correspondence of nondecreasing functions with positive measures, singular continuous functions correspond to singular continuous measures, i.e. an atomless positive Borel measures …
Showing that $\arctan$ is continuous - Mathematics Stack Exchange
Jan 5, 2016 · As such, $\arctan$ is continuous. If you define $\arctan$ by integrals or power series the result is immediate (the first by the Lipshitz continuity of the indefinite integral and the second from …
Continuous surjection $\mathbb R^m\to \mathbb R^n$ that is not a ...
Jul 27, 2024 · In fact, it turns out that every continuous function from a path connected space to $\mathbb R$ is a quotient map Note that the closed map lemma cannot be generalised, for example …
Prove that $a^x$ is continuous - Mathematics Stack Exchange
May 11, 2015 · It can be shown that for any 2 functions f and g, if f is continuous on R and g is a linear function with nonzero slope, f ∘ g is continuous so for any positive real number a, if exp (x) is …