Function takes reals exactly twice
118154
$f: \mathbb{R} \to \mathbb{R}$ that takes each value in $\mathbb{R}$ twice
151864
Derivative of the Absolute Value Function in Mathematica looks very different from the actual answer
70542
Entire function problem: translation
68617
Show that an entire function that is real only on the real axis has at most one zero, without the argument principle
112501
A funtion and its fourier transformation cannot both be compactly supported unless f=0
121319
Why do I get a converging result when pressing cosine multiple times on a calculator?
52385
Weird evaluation order in chained functions
75229
Can there be a function that's even and odd at the same time?
60222
Weird PHP floating point behavior
65971
Double dual mappings
69299
Why do these two multiplication operations give different results?
142448
Plotting a defined function gives different results from plotting the function directly
64134
The difference between two periodic functions converges to zero, is this two functions identical?
64015
What does the star and doublestar operator mean in a function call?
15050
why f is placed after float values?
16287
Why do I see a double variable initialized to some value like 21.4 as 21.399999618530273?
69426
Checking if the roots of a function are real