When do we say that s function is defined
72278
What is the value of $\frac{\sin x}x$ at $x=0$?
87239
Prove functions defined by sup and inf are continuous
69563
What are well-defined functions?
110051
Is square root a function?
137043
To show that function is constant
42218
How to find out the following function f which is a function of r?
57938
When do two functions become equal?
55601
Finding out which functions are called within a given function
77957
How is $\mathbb N$ actually defined?
41477
Prove $f(S \cap T) \subseteq f(S) \cap f(T)$
121218
Is this function a metric?
53358
What does it mean to extend a function?
88278
Show $S = f^{-1}(f(S))$ for all subsets $S$ iff $f$ is injective
156060
When we define the S-matrix, what are "in" and "out" states?
41363
when is f@g not the same as f[g]?
20529
Should I use s and s inside my s?
132657
Function $ f $ defined on unit disk $ D $ has real values on $ \partial D $, why is $ f $ real valued?